INSECTICIDAL AMINOTHIAZOLE DERIVATIVES

Abstract

Insecticidal aminothiazole derivatives and the use as an insecticide and acaricide of the compounds of formula (1): 1

Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the invention

[0002] The present invention relates to novel thiazole derivatives, which have insecticidal and acaricidal activity. The preparation and use, in agriculture and horticulture, of agrochemical compositions containing these novel insecticidal thiazoles are also disclosed.

[0003] 2. Description of the Related Art

[0004] It is known in the art that certain thiazole derivatives such as those disclosed in U.S. Pat. Nos. 4,199,506, 4,284,426, 4,371,389, 4,437,875, 4,437,876 have herbicide antidote properties and in Japan Kokai Koho 06-25199 have fungicidal properties. Furthermore, it is known in the art that UK patent application GB 2331748 discloses 5-cyano or thiocarbamoyl thiazole derivatives and their use as insecticides, acaricides or nematocides. The present invention concerns the novel thiazole derivatives which have excellent insecticidal and acaricidal activity.

SUMMARY OF THE INVENTION

[0005] In accordance with the present invention, thiazole derivatives are provided having the formula (1): 2

[0006] wherein

[0007] R1 is cyano or fluoroalkyl,

[0008] R2 is halogen, SCN or aryl,

[0009] R3 is H, C1-C6 alkyl, SO2R5 or C(O)R6,

[0010] R4 and R6 are, independently, aryl, phenylalkyl, alkyl, cycloalkyl groups, being optionally substituted by one or more of halogen, cyano, alkyl, alkenyl, alkynyl, haloalkyl, alkoxy, nitro, alkoxycarbonyl, alkylcarbonyloxy, alkylenedioxy, alkylcarbonyl, amino, alkylamino, haloalkoxy, alkylthio, alkylsulfonyl, haloalkenyl, alkoxycarbonylalkyl or alkoxycarbonylalkoxy; said aryl, phenylalkyl groups may additionally be fused to a cycloalkyl ring,

[0011] R5 is C1-C6 alkyl, haloalkyl,

[0012] X is O, S,NR7,

[0013] R7 is alkyl, cycloalkyl, alkoxy, alkenylalkyloxy, alkynylalkyloxy. alkoxycarbonylalkyloxy.

[0014] The present invention is directed to agrochemical compositions comprising as an active ingredient at least one of the novel thiazole derivatives of the present invention, as well as to the use of these active ingredients or compositions for pest control, and, in particular as insecticides and acaricides useful in agriculture and horticulture.

[0015] For a better understanding of the present invention, reference is made to the following description and its scope will be pointed out in the appended claims.

DETAILED DESCRIPTION OF THE INVENTION

[0016] For purposes of the present invention the general terms used hereinabove and hereinbelow have the following meanings, unless otherwise defined:

[0017] Alkyl groups are, in accordance with the number of carbon atoms, straight-chain or branched and will typically be methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-amyl, tert-amyl, 1-hexyl, or 3-hexyl. Cycloalkyl groups are generally cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl. Halogen and halo substituents will be understood generally as meaning fluoro, chloro, bromo, iodo. chloro, bromo, or iodo are preferred meanings in this invention. Haloalkyl can contain identical or different halogenatoms, typically fluoromethyl, difluoromethyl, difluorochloromethyl, trifluoromethyl, chloromethyl, trichloromethyl Fluoroalkyl is generally fluoromethyl, difluoromethyl, trifluoromethyl, pentafluoroethyl, n-heptafluoroprpyl, n-nonafluorobutyl, n-undecafluoropentyl, n-tridecafluorohexyl and preferably trifluoromethyl and pentafluoroethyl.

[0018] Alkoxy is typically methoxy, ethoxy, propyloxy, isopropyloxy, n-butyloxy, isobutyloxy, sec-butyloxy, and tert-butyloxy. methoxy and ethoxy are preferred.

[0019] Aryl is typically substituted phenyl or naphthyl, furyl, thienyl, six-membered heteroaromatic ring system such as pyridinyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl (1,2,3-, 1,2,4- and 1,3,5-), quinolinyl, isoquinolinyl,cinnolinyl, quinazolinyl, quinoxalinyl, indolinyl, isoindolinyl, five membered heteroaromatic ring such as thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, pyrazolyl, thiadiazolyl oxadiazolyl, pyrollyl, imidazolyl, triazolyl (1,2,3- and 1,2,4-), tetrazolyl, fused five membered rings such as benzofuranyl, benzothienyl, benzimidazolinyl; being optionally substituted by one or more of halogen, cyano, alkyl, alkenyl, alkynyl, haloalkyl, alkoxy, nitro, alkoxycarbonyl, alkylcarbonyloxy, alkylenedioxy, alkylcarbonyl, amino, alkylamino, haloalkoxy, alkylthio, alkylsulfonyl, haloalkenyl, alkoxycarbonylalkyl or alkoxycarbonylalkoxy.

[0020] Alkenyl and alkynyl groups preferably contain from 2 to 6, more preferably from 2 to 4, carbon atoms. They can be in the form of straight or branched chains, and, where appropriate, the alkenyl groups can be of either (E)- or (Z)-configuration. Examples are vinyl, allyl, propargyl.

[0021] The alkylenedioxy groups are optionally substituted with halogene (especially fluorine) and are such as methlenedioxy or difluoromethylenedioxy. Alkoxyalkyl is C1-C4 alkoxy(C1-C4)alkyl such as methoxymethyl or ethoxymethyl.

[0022] The present invention provides the use as insecticides or acaricides of thiazole derivatives having the following formula (1): 3

[0023] wherein R1 is cyano or fluoroalkyl (especially C1-C4 fluoroalkyl), R2 is halogen, SCN or aryl (especially phenyl, naphthyl, pyridinyl; being optionally substituted by one or more of halogen, alkyl, haloalkyl, alkoxy, nitro, alkylthio, or alkylsulfonyl), R3 is H, C1-C6 alkyl, SO2R5 or C(O)R6, R4 and R6 are, independently, aryl (especially phenyl, naphthyl, pyridinyl, pyrimidinyl, thienyl, furyl, thiazolyl, isothiazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiadiazolyl (1,2,4, and 1,3,4), oxadiazolyl (1,2,4- and 1,3,4); being optionally substituted by one or more of halogen, cyano, alkyl, haloalkyl, alkoxy, nitro, alkoxycarbonyl, alkylcarbonyloxy, alkylcarbonyl, amino, alkylamino, haloalkoxy, alkylthio, or alkylsulfonyl), R5 is alkyl (especially C1-C6 alkyl), haloalkyl (especially C1-C6 haloalkyl), X is O, S, NR7, R7 is alkyl (especially C1-C6 alkyl), cycloalkyl (especially C3-C6 cycloalkyl), alkoxy (especially C1-C6 alkoxy), alkenylalkyloxy (especially (C2-C6)alkenyl(C1-C6)alkyloxy), alkynylalkyloxy (especially (C2-C6)alkynyl(C1-C6)alkyloxy), alkoxycarbonylalkyloxy (especially (C1-C6)alkoxycarbonyl(C1-C6)alkyloxy).

[0024] Examples of specific compounds of formula (1) which are of use as insecticides and acaricides include the compounds listed in Table 1 at the end of this disclosure.

[0025] A compound of formula (1) wherein R2 is halogen and X is oxygen can be prepared by reacting a compound of formula (2): 4

[0026] with a compound R4C(O)Cl in the presence of an organic base such as pyridine and triethylamine, or inorganic base such as potassium carbonate and sodium hydride.

[0027] A compound of formula (1) wherein R2 is halogen and X is sulfur can be prepared by reacting a compound of formula (1) wherein X is oxygen with phosphorous pentasulfide in a high boiling solvent such as pyridine, picoline, lutidine, or xylene, sulfolane or by reacting a compound of formula (3): 5

[0028] with a substituted thioamide R4C(S)NHR3 in the presence of a base such as sodium hydride or sodium hydroxide.

[0029] Surprisingly, it has now been found that the novel compounds of formula (1) have, for practical purposes, a very advantageous spectrum of activities for protecting plants against insect and acarine pests, include such as Coleoptera, Diabrotica, Diptera, Homoptera and Lepidoptera, Heteroptera, Thysanoptera, Orthoptera and Acarina. The pests include those pests associated with agriculture, horticulture and animal husbandry, forestry, the storage of products of vegetable origin, such as fruit, grain, and timber, and also those pests associated with the transmission of diseases of man and animals. Examples of insect and acarine pest species which may be controlled by the compounds of formula (1) include: Pieris brassicae (white butterfly), Pseudaletia separata (rice armyworm), Heliothis virescens (tobacco budworm), Trialeurodes spp. (white flies), Aedes aegypti (mosquito), Agrotis spp. (cutworms), Blatta orientalis (cockroach), Anopheles spp. (mosquitos), Chilo partellus (maize stem borer), Culex spp. ((mosquitos), Dysdercus fasciatus (capsid), Musca domestica (housefly), Plutella xylostella (diamond back moth), Aonidiella spp. (scale insects), , Bemisia tabaci (sweetpotato white fly), Blattella germanica (German cockroach), Myzus persicae (green peach aphid), Aphis gossypii (cotton aphid), Aphis fabae (bean aphid), Periplaneta americana (American cockroach), Phaedon cochleariae (mustard beetle), Spodoptera littoralis (cotton leafworm), Chortiocetes terminifera (locust), Diabrotica spp. (rootworms), Nilaparvata lugens (brown rice planthopper), Nephotettix cincticeps (green rice leafhopper), Tetranychus cinnabarinus (carmine spider mite), Panonychus ulmi (European red mite), Phyllocoptruta oleivora (citrus rust mite), Panonychus citri (citrus red mite), Tetranychus urticae (two-spotted spider mite), Polyphagotarsonemus latus (brode mite) and Brevipalpus spp. (mites).

[0030] Compounds of the formula (1) are nomally used in the form of compositions and can be applied to the crop and/or plant to be treated, simultaneously with or in succession with other compounds such as fertilizers, micronutrient donors or other preparations which influence the growth of plants. The thiazole derivatives of formula (1) can also be selectively combined with herbicides, as well as, other insecticides, fungicides, bactericides, nematocides, molluscicides or mixtures of several of these preparations and, if desired together with further carriers, surfactants or application promoting adjuvants employed in the art of formulation. In some cases, by mixing of the thiazole derivatives of formula (1) with other insecticides results synergistic insecticidal activity.

[0031] When applying the compound of the present invention in a practical way, the compound may be applied in a form as it is without adding other components. When the compound of the present invention is applied for plant protection purpose, the compound can be prepared into general types of formulations for plant protection use, such as wettable powder, granules, dust, emulsifiable concentrate, water soluble powder, suspension concentrate, flowable liquid, and so on.

[0032] In case the compound of the present invention is prepared into a solid type formulation, appropriate additives and carriers may be incorporated with the compound. Examples of the additive and the carrier include phytogenic powders, such as soybean powder and flour, mineral fine powders, such as diatomaceous earth, apatite, gypsum, talc, bentonite, pyrophyllite and clay, and organic and inorganic compounds, such as sodium benzoate, urea and Glauber's salt. In case the compound of the present invention is prepared into a liquid type formulation, an appropriate solvent is used for dissolving or dispersing the compound in the liquid type formulation. Examples of the solvent used for the liquid formulation include petroleum fractions, such as kerosine, xylene and solvent naphtha, cyclohexane, cyclohexanone, dimethylformamide, dimethylsulfoxide, alcohol, acetone, methyl isobutyl ketone, mineral oils, vegetable oils and water.

[0033] In addition, in order to provide uniformity and stability to the compound in the prepared formulations, it is possible to add surface active agents into each formulation upon necessity. There is no limitation for the surface active agent, and examples of the surface active agent that can be added to the above-mentioned formulations include nonionic surface active agents, such as polyoxyethylene-added alkyl ether, polyoxyethylene-added higher fatty acid ester, polyoxyethylene-added sorbitan higher fatty acid ester and polyoxyethylene-added tristyryl phenyl ether, a sulfate ester of polyoxyethylene-added alkyl phenyl ether, an alkyl benzene sulfonate, a polycarbonate, a lignin sulfonate, a formaldehyde condensate of alkyl naphthalene sulfonate, and a copolymer of isobutylene and maleic anhydride.

[0034] In general, the content of an active ingredient in each of the formulations recited above is preferably in a range of from 0.01 to 90% by weight, and more preferably from 0.05 to 85% by weight based on the total weight of the formulation. Each of the prepared formulations, such as wettable powder, emulsifiable concentrate, suspension concentrate and flowable solution, is diluted with water to be prepared and adjusted into the suspension or emulsion with a desired concentration, and is applied to crop plants. For the formulations, such as granular and dust formulations, the formulation itself is directly applied to the target crop plants or soil.

[0035] Needless to say that the compound alone according to the present invention has sufficient insecticidal and acaricidal activity, however, it can be combined for the use with one or more of various types of other plant protection chemicals, for example, fungicides, insecticides, acaricides and synergists.

[0036] Hereunder, representative examples for fungicides, insecticides, acaricides and plant growth regulators those which can be combined to use with the compound according to the present invention will be recited below.

[0037] Fungicides:

[0038] Captan, Folpet, Thiuram, Ziram, Zineb, Maneb, Mancozeb, Propineb, Polycarbamate, Chlorothalonil, Quintozene, Captafol, Iprodione, Procymidone, Vinclozolin, Fluorimide, Cymoxanil, Mepronil, Flutolanil, Pencycuron, Oxycarboxine, Fosetyl aluminium, Propamocarb, Triadimefon, Triadimenol, Propiconazole, Diclobutrazol, Bitertanol, Hexaconazol, Microbutanil, Flusilazole, Etaconazole, Fluotrimazole, Flutriafen, Penconazole, Diniconazole, Cyproconazole, Fenarimol, Triflumizole, Prochloraz, Imazalyl, Pefurazoate, Tridemorph, Fenpropimorph, Triforine, Buthiobate, Pyrifenox, Anilazine, Polyoxins, Metalaxyl, Oxadixyl, Furalaxyl, Isoprothiolane, Probenazole, Pyrrolenitrine, Blastocidin-S, Kasugamycin, Balidamycin, Dihydrostreptomycin sulfate, Benomyl, Carbendazim, Thiophanate methyl, Hymexazol, Basic copper chloride, Basic copper sulfate, Fentin acetate, Triphenyltin hydroxide, Diethofencarb, Metasulfocarb, Quinomethionate, Binapacryl, Lecithin, Sodium hydrogencarbonate, Dithianone, Dinocap, Fenaminosulf, Diclomezine, GuazatineDodine, IBP, Edifenphos, Mepanipyrim, Ferimzone, Trichlamide, Metasulfocarb, Fluazinam, Ethoquinolac, Dimetomorph, Pyroquilon, Tecloftalam, Fthalide, Fenazine oxide, Thiabedazole, Tricyclazole, Vinclozolin, Cymoxanil, Cyclobutanil, Guaztine, Propamocarb hydrochloride, Oxolinic acid.

[0039] Insecticides and Acaricides:

[0040] Organophosphorous and carbamate insecticides: Fenthion, Fenitrothion, Diazinon, Chlorpyrifos, ESP, Vamidothion, Fenthoate, Dimethoate, Formothion, Malathion, Trichlorfon, Thiometon, Phosmet, Dichlorvos, Acephate, EPBP, Methyl parathion, Oxadimeton methyl, Ethion, Salithion, Cyanophos, Isoxathione, Pyridafenthion, Phosalone, Methidathion, Sulprofos, Chlorfevinphos, Tetrachlorvinphos, Dimethylvinphos, Propaphos, Isofenphos, Ethyl thiometon, Profenophos, Pyraclofos, Monocrotophos, Azinphos methyl, Aldicarb, Methomyl, Dithiocarb, Carbofuran, Carbosulfan, Benfuracarb, Furathiocarb, Propoxur, BPMC, MTMC, MIPC, carbaryl, Pyrimicarb, Ethiofencarb, Fenoxycarb, cartap, thiocyclam, bensultap, etc.

[0041] Pyrethroid insecticides: Permethrin, Cypermethrin, Deltamethrin, Fenvalerate, Fenpropathrin, Pyrethrin, Allethrin, Tetramethrin, Resmethrin, Dimethrin, Propathrin, Fenothrin, Prothrin, Fluvalinate, Cyfluthrin, Cyhalothrin, Flucythrinate, Ethofenprox, Cycloprothrin, Tralomethrin, Silafluofen, Brofenprox, Acrinathrin, etc.

[0042] Bezoyl urea and other insecticides: Diflubenzuron, Chlorfluazuron, Hexaflumuron, Triflumuron, Tetrabenzuron, Fulfenoxuron, Flucycloxuron, Buprofezin, Pyriproxyfen, Methoprene, Benzoepin, Diafenthiuron, Imidacloprid, Fipronyl, Nicotin sulfate, Rotenone, Metaldehyde, Machine oil, Microbial insecticides such as BT and insect-pathogenic viruses, etc.

[0043] NEMATICIDES: Fenamiphos, Fosthiazate, etc.

[0044] Acaricides:

[0045] Chlorbenzilate, Fenisobromolate, Dicofol, Amitraz, BPPS, Benzomate, Hexythiazox, Fenbutatin oxide, Polynactin, Quinomethionate, CPCBS, Tetradifon, Avermectin, Milbemectin, Clofentezin, Cyhexatin, Pyridaben, Fenpyroxymate, Tebufenpyrad, Pyrimidifen, Fenothiocarb, Dienochlor, etc.

[0046] Plant Groth Regulators: Gibberellins(e.g., Gibberellin A3, Gibberellin A4, Gibberellin A7), IAA, NAA, etc.

EXAMPLES

[0047] The following examples serve to provide further appreciation of the invention but are not meant in any way to restrict the effective scope of the invention. The structures of isolated novel compounds were confirmed by NMR, Mass, and/or other appropriate analysis.

Example 1

[0048] 2-Amino-5-chloro-4-trifuloromethylthiazole:

[0049] 2-Amino-4-trifluoromethylthiazole (10 g) was dissolved in acetonitrile (80 ml) and N-chlorosuccinimide (8.8 g) was added at room temperature with stirring. The mixture was refluxed for 9 hr and the solvent was removed under reduced pressure. The residue was dissolved in chloroform and washed with cold diluted aqueous sodium hydroxide. The chloroform layer was dried over magnesium sulfate and the solvent was removed under reduced pressure to give crude 2-Amino-5-chloro-4-trifuloromethylthiazole (12 g). It was recrystallized from n-hexane-benzene (1:1 mixture) as colorless needles (6.8 g), m. p. 107-108° C.

Example 2

[0050] 2-Amino-5-iodo-4-trifuloromethylthiazole:

[0051] 2-Amino-4-trifluoromethylthiazole (10 g) was dissolved in acetonitrile (100 ml) and N-iodosuccinimide (14.7 g) was added at room temperature with stirring. The mixture was refluxed for 6 hr and the solvent was removed under reduced pressure. The residue was dissolved in chloroform and washed with cold diluted aqueous sodium hydroxide. The chloroform layer was dried over magnesium sulfate and the solvent was removed under reduced pressure to give crude 2-Amino-5-iodo-4-trifuloromethylthiazole (16 g). It was recrystallized from n-hexane-benzene (1:1 mixture) as pale orange prisms (10.9 g), m. p. 108-109° C.

Example 3

[0052] 2-Amino-5-thiocyanato-4-trifuloromethylthiazole:

[0053] 2-Amino-4-trifluoromethylthiazole (10 g), ammonium thiocyanate (13.6 g) was mixed in acetic acid (120 ml) and bromine (9.6 g) in acetic acid (100 ml) was added dropwise at 5-10° C. for 1 hr with stirring. The mixture was further stirred for 1 hr at room temperature. The solvent was removed under reduced pressure and the residue was added ice water then neutralized with aqueous sodium carbonate. The precipitates were filtered off and recrystallized from methanol-water to give 2-Amino-5-thiocyanato-4-trifuloromethylthiazole (9.5 g) as pale green crystals, m. p. 147-150° C.

Example 4

[0054] N-(5-Iodo-4-trifluoromethylthiazol-2-yl)-2,6-dichloro-benzamide;

[0055] 2-Amino-5-iodo-4-trifluoromethylthiazole (0.8 g) was dissolved in pyridine (3 ml) and 2,6-dichlorobenzoylchloride (0.6 g) was added at room temperature with stirring. The mixture was stirred for 1 day at room temperature. The mixture was poured into ice water and acidified with aqueous hydrochloric acid then extracted with chloroform. The chloroform layer was dried over magnesium sulfate and the solvent was removed under reduced pressure. The solid thus obtained was recrystallized from methanol to give N-(5-iodo-4-trifluoromethylthiazol-2-yl)-2,6-dichlorobenzamide (0.9 g), m. p. 157-159° C.

Example 5

[0056] N-(5-Iodo-4-trifluoromethylthiazol-2-yl)-4-trifluoromethyl-benzamide;

[0057] 2-Amino-5-iodo-4-trifluoromethylthiazole (2.5 g) was dissolved in pyridine (8 ml) and 4-trifluoromethylbenzoylchloride (1.8 g) was added at room temperature with stirring. The mixture was stirred for 1 day at room temperature. The mixture was poured into ice water and acidified with aqueous hydrochloric acid then extracted with chloroform. The chloroform layer was dried over magnesium sulfate and the solvent was removed under reduced pressure. The solid thus obtained was recrystallized from methanol to give N-(5-iodo-4-trifluoromethylthiazol-2-yl)-4-trifluoro-methylbenzamide (2.9 g), m. p. 197-198° C.

Example 6

[0058] N-(5-Bromo-4-trifluoromethylthiazol-2-yl)-3,4-dicloro-benzamide;

[0059] 2-Amino-5-bromo-4-trifluoromethylthiazole (1.0 g) was dissolved in pyridine (5 ml) and 3,4-dichlorobenzoylchloride (0.85 g) was added at room temperature with stirring. The mixture was stirred for 5 hr at room temperature. The mixture was poured into ice water and acidified with aqueous hydrochloric acid then extracted with chloroform. The chloroform layer was dried over magnesium sulfate and the solvent was removed under reduced pressure. The solid thus obtained was recrystallized from methanol to give N-(5-bromo-4-trifluoromethylthiazol-2-yl)-3,4-dicloro-benzamide (1.29 g), m. p. 191-192° C.

Example 7

[0060] N-(5-Chloro-4-trifluoromethylthiazol-2-yl)-4-chloro-3-nitrobenzamide;

[0061] 2-Amino-5-chloro-4-trifluoromethylthiazole (1.0 g) was dissolved in pyridine (5 ml) and 4-chloro-3-nitrobenzoylchloride (1.1 g) was added at room temperature with stirring. The mixture was stirred for 1 day at room temperature. The mixture was poured into ice water and acidified with aqueous hydrochloric acid then extracted with chloroform. The chloroform layer was dried over magnesium sulfate and the solvent was removed under reduced pressure. The solid thus obtained was recrystallized from methanol to give N-(5-chloro-4-trifluoromethylthiazol-2-yl)-4-chloro-3-nitro-benzamide (0.83 g), m. p. 183-184° C.

Example 8

[0062] N-(5-Iodo-4-trifluoromethylthiazol-2-yl)-3,5-bis-trifluoromethylbenzamide;

[0063] 2-Amino-5-iodo-4-trifluoromethylthiazole (1.0 g) was dissolved in pyridine (2 ml) and 3,5-bis-trifluoromethylbenzoylchloride (0.95 g) was added at room temperature with stirring. The mixture was stirred for 6 hr at room temperature. The mixture was poured into ice water and acidified with aqueous hydrochloric acid then extracted with chloroform. The chloroform layer was dried over magnesium sulfate and the solvent was removed under reduced pressure. The solid thus obtained was recrystallized from methanol to give N-(5-iodo-4-trifluoromethylthiazol-2-yl)-3,5-bis-trifluoromethylbenzamide (1.3 g), m. p. 172-173° C.

Example 9

[0064] N-(5-Bromo-4-trifluoromethylthiazol-2-yl)thiophene-2-carboxamide;

[0065] 2-Amino-5-iodo-4-trifluoromethylthiazole (1.2 g) was dissolved in pyridine (2 ml) and thiophene-2-carbonyl chloride (0.80 g) was added at room temperature with stirring. The mixture was stirred for 6 hr at room temperature. The mixture was poured into ice water and acidified with aqueous hydrochloric acid then extracted with chloroform. The chloroform layer was dried over magnesium sulfate and the solvent was removed under reduced pressure. The solid thus obtained was recrystallized from methanol to give N-(5-iodo-4-trifluoromethylthiazol-2-yl)thiophene-2-carboxamide (1.2 g), m. p. 184-185° C.

Example 10

[0066] N-(5-(4-Fluorophenyl)-4-trifluoromethylthiazol-2-yl)-4-trifluoromethylbenzamide;

[0067] N-(5-Iodo-4-trifluoromethylthiazol-2-yl)-4-trifluoromethylbenzamide (0.8 g), powdered sodium hydroxide (0.29 g), tetrakis(triphenylphosphine)-palladium(0) (0.2 g) and 4-fluorophenylboronic acid (0.24 g) were mixed together in tetrahydrofuran (30 ml). The resulting suspension was refluxed for 8 hr with stirring. The solvent was removed under reduced pressure and the residue was mixed with water then extracted with chloroform. The chloroform layer was dried over magnesium chloride and the solvent was removed under reduced pressure. The solid remained was recrystallized from methanol to give N-(5-(4-fluorophenyl)-4-trifluoromethylthiazol-2-yl)-4-trifluoromethylbenzamide as slightly gray needles (0.55 g), m. p. 203-205° C.

Example 11

[0068] N-(5-thiocyanato-4-trifluoromethylthiazol-2-yl)-3-trifluoromethylbenzamide;

[0069] 2-Amino-5-thiocyanato-4-trifluoromethylthiazole (0.8 g) was dissolved in pyridine (5 ml) and 3-trifluoromethylbenzoylchloride (0.8 g) was added at room temperature with stirring. The mixture was stirred for one night at room temperature. The mixture was poured into ice water and acidified with aqueous hydrochloric acid then extracted with chloroform. The chloroform layer was dried over magnesium sulfate and the solvent was removed under reduced pressure. The solid thus obtained was recrystallized from carbon tetrachloride to give N-(5-thiocyanato-4-trifluoromethylthiazol-2-yl)-3-trifluoromethylbenzamide (0.8 g), m. p. 167-168° C.

[0070] Examples for carrying out the formulations comprising the compound of the present invention will be explained. However, it should be noted that the type and incorporating rate of additives are not limited to those described in the following examples and may be modified over extensive range. Note that the term of “part” in the formulation example described below denotes “part by weight”.

Example 12

[0071] Wettable Powder Formulation 1 A compound of present invention 40 part Diatomaceous earth 53 part Higher alcohol sulfate  4 part Alkylnaphthalenesulfonate  3 part

[0072] The components given above are mixed and pulverized to fine particles to thereby give a wettable powder formulation for the compound of the present invention with the content of 40% based on the active ingredient.

Example 13

[0073] Emulsifiable Concentrate Formulation 2 A compound of present invention 30 part Xylene 33 part Dimethylformamide 30 part Polyoxyethylene alkyl allyl ether  7 part

[0074] The components given above are mixed and prepared to a solution to thereby give an emulsifiable concentrate formulation for the compound of the present invention with the content of 30% based on the active ingredient.

Example 14

[0075] Dust Formulation 3 A compound of present invention 10 part Talc 89 part Polyoxyethylene alkyl allyl ether  1 part

[0076] The components given above are mixed and pulverized to fine particles to thereby give a dust formulation for the compound of the present invention with the content of 10% based on the active ingredient.

Example 15

[0077] Granular Formulation 4 A compound of present invention  5 part Clay 73 part Bentonite 20 part Dioctylsulfosuccinate sodium salt  1 part Sodium phosphate  1 part

[0078] The components given above are mixed, thoroughly grinded, added with water, then kneaded, and granulated, and further dried to thereby give a granular formulation for the compound of the present invention with the content of 5% based on the active ingredient.

Example 16

[0079] Suspension Concentrate Formulation 5 A compound of present invention   10 part Sodium ligninsulfonate   4 part Sodium dodecylbenzenesulfonate   1 part Xanthane gum  0.2 part Water 84.8 part

[0080] The components given above are mixed and grinded by wet grinding to a particle size of less than 1 &mgr;m to thereby give a suspension concentrate for the compound of the present invention with the content of 10% based on the active ingredient.

Example 17

[0081] Efficacy Against Tetranychus Urticae (Tu; Two-spotted Spider Mites

[0082] Fifteen adult females were inoculated on a potted Kidney-bean seedling. On the next day, the chemical solution at different concentration was sprayed on the Kidney-bean seedling by a glass nozzle using an air compressor. After air-dried the Kidney-bean pot was maintained in a room kept at 25° C. and 65% RH.

[0083] On three days after treatment, the numbers of dead and alive mites were counted and mortality was calculated by Abbott's formula. Each test was duplicated.

[0084] Abbott's formula: 1 mortality = Survival ⁢   ⁢ rate ⁢   ⁢ in ⁢   ⁢ untreated ⁢   ⁢ plot - Survival ⁢   ⁢ rate ⁢   ⁢ in ⁢   ⁢ treated ⁢   ⁢ plot Survival ⁢   ⁢ rate ⁢   ⁢ in ⁢   ⁢ untreated ⁢   ⁢ plot × 100

[0085] The results show that the following compounds had mortality of 100%: 19, 23, 33, 47, 88.

Example 18

[0086] Efficacy Against Pseudaletia separata Walker (Ps; Rice Armyworm)

[0087] A piece of Maize leaf (ca.7×1.5 cm) was dipped in the chemical solution at 125 ppm for 30 sec and air-dried. The leaf was placed in a glass petri dish (9 cm diameter) and five second-instar larvae of Pseudaletia separata were introduced into the petri dish. Five days after the treatment, the number of survival larvae was counted and the mortality was calculated by Abbott's formula. Each test was duplicated. The results show that the following compounds had mortality of 100%: 1, 7, 13, 14, 19, 20, 23, 33, 35, 44, 45, 47, 59, 81, 88, 89.

Example 19

[0088] Efficacy Against Plutella xylostella Linne (Px; Diamondback Moth)

[0089] The chemical solution at 125 ppm was sprayed on a Cabbage seedling by a glass nozzle using an air compressor. After airdried, a small leaf (ca. 5 cm diameter) was detached from the treated plant and placed in a glass petri dish (ca.9cm diameter). Five second-instar larvae of Plutella xylostella were introduced into the petri dish. Three days after the treatment, the number of survival larvae was counted and the mortality was calculated by Abbott's formula. Each test was duplicated. The results show that the following compounds had mortality of 100%: 1, 13, 19, 23, 45, 47, 88, 89. 6 TABLE 1 6 Compound No. R1 R2 R3 R4 X m.p. 1 CF3 I H 3-CF3—C6H4 O 171-172 2 CF3 I H 2,6-F2—C6H3 O 203-204 3 CF3 Cl H 4-Me—C6H4 O 142-143 4 CF3 Cl Me 3-Cl—C6H4 O 5 CF3 Cl H 2,4-F2—C6H3 O 6 CF3 Cl H 2,4,6-Me3—C6H2 O 7 CF3 I H 4-t-Bu—C6H4 O 189-190 8 CF3 F H 3-CF3—C6H4 O 9 CF3 F H 4-Cl—C6H4 O 10 CF3 Br H 2,4-Cl2—C6H3 S 11 CF3 I H 3,4-Cl2—C6H3 S 12 CF3 Cl H 2,4-F2—C6H3 S 13 CF3 Br H 3-CF3—C6H4 O 113-114 14 CF3 Br H C6H5 O 155-157 15 CF3 I H 3-CF3—C6H4 N—OMe 107-108 16 CN I H 3-CF3—C6H4 O 17 CN I H 3-Cl—C6H4 O 18 CF3 I Me 3-CF3—C6H4 S 19 CF3 Br H 3,4-Cl2—C6H3 O 191-192 20 CF3 Br H 2,6-Cl2—C6H3 O 154-155 21 C2F5 I H 3-Cl—C6H4 O 22 C2F5 I H 3-CF3—C6H4 O 23 CF3 Br H 4-CF3—C6H4 O 193-194 24 CF3 Cl H 4-t-Bu—C6H4 S 25 CF3 I H 4-OMe—C6H4 N—OEt 26 CF3 4-CF3—C6H4 H 3-CF3—C6H4 O 27 CN 4-C6H5—C6H4 H 3-CF3—C6H4 O 28 CF3 Br H 2-CF3—C6H4 O 29 CF3 Br H 3-Cl—C6H4 O 30 CF3 Br H 3-OCF3—C6H4 O 31 CF3 F H 2,6-OMe2—C6H3 O 32 CF3 SCN H 4-Cl—C6H4 O 33 CF3 Br H 2,4-F2—C6H3 O 143-144 34 CF3 Br H 2-thienyl O 184-185 35 CF3 I H 1-C6H5-5-CF3-pyrazol-4-yl O 144-145 36 C3F7 I H 4-Cl—C6H4 O 37 CF3 F H 2,4-Cl2—C6H3 O 38 CF3 4-C6H5O—C6H4 H 4-Me—C6H4 O 39 CF3 Cl Me 4-Me—C6H4 O 120-121 40 CF3 I H 2,4,6-Cl3—C6H2 O 41 CF3 I H 4-C6H4—C6H4 O 42 CF3 I H 4-n-C6H11-C6H4 O 43 CN Br H 3-Cl—C6H4 S 44 CF3 I H 2,6-Cl2—C6H3 O 157-159 45 CF3 I H 4-CF3—C6H4 O 197-198 46 CF3 Br H t-Bu O 145-147 47 CF3 Cl H 2,4-Cl2—C6H3 O 146-147 48 CF3 Cl H n-C17H35 O 23-24 49 CF3 Cl H cyclohexyl O 50 CF3 I H 4-C6H4—C6H4 S 51 CF3 Br H 2,4-Me2—C6H3 S 52 CF3 Br H 4-C6H4O—C6H4 O 53 CF3 Br H 4-Cl-2-Me—C6H3 O 54 CF3 Br Me 2,4-F2—C6H3 O 55 CN I H 3-CF3—C6H4 S 56 CF3 Br H 2,6-(OMe)2—C6H3 O 57 CF3 Cl Me 4-Me—C6H4 S 101-102 58 CF3 Cl H 2,6-Cl2—C6H3 O 153-154 59 CF3 Cl H C6H5 O 143-144 60 C3F7 I H 3-CF3—C6H4 O 61 CF3 I Me 3,4-Cl2—C6H3 S 62 CF3 Br H 3-CN—C6H4 O 63 CF3 3-C6H5—C6H4— H 3-CF3—C6H4 O 64 CF3 I H 4-CO2Et—C6H4 O 65 CF3 Br H 3-F—C6H4 O 66 CF3 Br H 3,5-Me2—C6H3 O 67 CF3 I H 3-CF3—C6H4 N—O—CH2CO2Et 68 CF3 Br H 2-Cl-4-CN—C6H3 O 69 CF3 Br H 2-Cl-4-OMe—C6H3 O 70 CF3 Cl H 3-Cl—C6H4 S 71 CF3 I H 1-naphthyl S 72 CF3 I H 3-Cl—C6H4 N—O-allyl 73 CF3 I H 4-EtOCO2—C6H4 O 74 CF3 Cl Me 2,4-Cl2—C6H3 O 95-96 75 CN Br H 4-CF3—C6H4 S 220-223 76 CF3 Br H 4-NO2—C6H4 O 77 CF3 Cl Me 3-CF3—C6H4 O 82-83 78 CF3 Br H 3-Ac—C6H4 O 79 CF3 I i-Bu 3-CF3—C6H4 O 80 CF3 Cl H 4-Cl-3-NO2—C6H3 O 183-184 81 CF3 4-F—C6H5 H 4-CF3—C6H4 O 203-205 82 CF3 I H 2-Cl-4-CF3-thiazol-5-yl O 146-147 83 CF3 I H 3-CF3—C6H4 N—O-propargyl 84 CF3 Br H 3,4-OCH2O—C6H3 O 85 CF3 Br H 4-Me2N—C6H4 O 86 CF3 I H 3-OCF3—C6H4 O 152-155 87 CF3 I H 2-CF3—C6H4 O 137-138 88 CF3 Cl H 3-CF3—C6H4 O 115-116 89 CF3 I H 3-CF3—C6H4 S 157-158 90 CF3 Br H 3-Cl—C6H4 O 133-134 91 CF3 I H 1-CH3-3-CF3-pyrazol-4-yl O 196-200 92 CF3 I H 4-SMe—C6H4 O 93 CF3 Cl H 2-OMe—C6H4 O 187-188 94 CF3 Cl H 3,5-(CF3)2—C6H3 O 136-137 95 CF3 Cl H 3,5-Me2—C6H3 O 158-159 96 CF3 Cl H 3,4-Cl2—C6H3 O 198-199 97 CF3 I H 4-SO2Me—C6H4 O 98 CF3 Br H 4-(Cl2C═H)—C6H4 O 99 CF3 Br H 4-AcOCH2—C6H4 O 100 CF3 I H C6H5CH2 O 101 CN Br H 4-CF3—C6H4 O 235-236 102 CF3 I H 3,5-(CF3)2—C6H3 O 172-173 103 CF3 I Ac 3-CF3—C6H4 O 104 CF3 I CF3SO2 3-CF3—C6H4 O 105 CF3 I MeSO2 3-CF3—C6H4 O 106 CF3 Cl Me 2,4-Cl2—C6H3 S 107 CF3 I CF3SO2 3-Cl—C6H4 O 108 CF3 Cl H 2,4-F2—C6H3 O 120-121 109 CF3 Cl H 4-t-Bu—C6H4 O 173-174 110 C2F5 I H 3,5-(CF3)2—C6H3 O 111 CF3 Cl Me 3-CF3—C6H4 S 104-105 112 CN Cl H 3-Cl—C6H4 O 113 CF3 3,5-Me2—C6H3 H 3-CF3—C6H4 O 114 CF3 I Et 3-CF3—C6H4 O 114 CF3 I Ac 3-CF3—C6H4 N—OMe 115 CF3 I H 3,5-(CF3)2—C6H3 S 116 CN Br H 3-CF3—C6H4 S 215-216 117 CF3 I H 2-CF3—C6H4 S 118 CF3 F H 4-F—C6H4 O 119 CF3 Cl H 3-pyridinyl O 184-185 120 CN I H 3,5-(CF3)2—C6H3 O 121 CN Br H 3-CF3—C6H4 O 209-210 122 CF3 Cl H n-C6H13—C6H4 O 123 CF3 Cl H 1-naphthyl O 141-142 124 CF3 Cl H 4-C6H4—C6H4 O 153-154 125 CF3 Cl H 3-OCF3—C6H4 O 126 CF3 I CF3SO2 3,5-(CF3)2—C6H3 O 127 CF3 Cl H C6H5CH2 O 85-86 128 CF3 SCN H 2,4-Cl2—C6H3 O 129 CF3 Br H 3-pyridinyl O 182-183 130 CF3 Cl H 1-naphthyl S 131 CF3 SCN H 3-CF3—C6H4 O 167-168 132 CF3 3-CF3—C6H4 H 3-CF3—C6H4 O 250 up 133 CF3 4-Cl—C6H4 H 3-CF3—C6H4 O 134 CF3 I H 4-Cl—C6H4 O 135 CF3 I H 3-pyridinyl O 136 CF3 3-CF3—C6H4 H 3-CF3—C6H4 O 137 CF3 I H 5-I-4-CF3-thiazol-2-yl O 138 CF3 I H 1-naphthyl O 139 CF3 SCN H 2,6-F2—C6H3 O 125-127 140 CF3 3-CF3—C6H4 H 3-CF3—C6H4 S 101-103 141 CF3 Cl H 3,4-Cl2—C6H3 S 145-146 142 CF3 Br propargyl 2,4-F2—C6H3 O 50-52

Claims

1. An insecticide and/or acaricide wherein the insecticide and/or acaricide includes a compound having at least one of a thiazole derivative of formula (1):

7

wherein R1 is cyano or fluoroalkyl (especially C1-C4 fluoroalkyl), R2 is halogen, SCN or aryl (especially phenyl, naphthyl, pyridinyl; being optionally substituted by one or more of halogen, alkyl, haloalkyl, alkoxy, nitro, alkylthio, or alkylsulfonyl), R3 is H, C1-C6 alkyl, SO2R5 or C(O)R6, R4 and R6 are, independently, aryl (especially phenyl, naphthyl, pyridinyl, pyrimidinyl, thienyl, furyl, thiazolyl, isothiazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiadiazolyl (1,2,4, and 1,3,4), oxadiazolyl (1,2,4 and 1,3,4); being optionally substituted by one or more of halogen, cyano, alkyl, haloalkyl, alkoxy, nitro, alkoxycarbonyl, alkylcarbonyloxy, alkylcarbonyl, amino, alkylamino, haloalkoxy, alkylthio, or alkylsulfonyl), R5 is alkyl (especially C1-C6 alkyl), haloalkyl (especially C1-C6 haloalkyl), X is O, S, NR7, R7 is alkyl (especially C1-C6 alkyl), cycloalkyl (especially C3-C6 cycloalkyl), alkoxy (especially C1-C6 alkoxy), alkenylalkyloxy (especially (C2-C6)alkenyl(C1-C6)alkyloxy), alkynylalkyloxy (especially (C2-C6)alkynyl(C1-C6)alkyloxy), alkoxycarbonylalkyloxy.

2. An agrochemical composition comprising an insecticidally or acaricidally effective amount of a compound having at least one of a thiazole derivative of formula (1)

8

wherein R1 is cyano or fluoroalkyl (especially C1-C4 fluoroalkyl), R2 is halogen, SCN or aryl (especially phenyl, naphthyl, pyridinyl; being optionally substituted by one or more of halogen, alkyl, haloalkyl, alkoxy, nitro, alkylthio, or alkylsulfonyl), R3 is H, C1-C6 alkyl, SO2R5 or C(O)R6, R4 and R6 are, independently, aryl (especially phenyl, naphthyl, pyridinyl, pyrimidinyl, thienyl, furyl, thiazolyl, isothiazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiadiazolyl (1,2,4, and 1,3,4), oxadiazolyl (1,2,4 and 1,3,4); being optionally substituted by one or more of halogen, cyano, alkyl, haloalkyl, alkoxy, nitro, alkoxycarbonyl, alkylcarbonyloxy, alkylcarbonyl, amino, alkylamino, haloalkoxy, alkylthio, or alkylsulfonyl), R5 is alkyl (especially C1-C6 alkyl), haloalkyl (especially C1-C6 haloalkyl), X is O, S, NR7, R7 is alkyl (especially C1-C6 alkyl), cycloalkyl (especially C3-C6 cycloalkyl), alkoxy (especially C1-C6 alkoxy), alkenylalkyloxy (especially (C2-C6)alkenyl(C1-C6)alkyloxy), alkynylalkyloxy (especially (C2-C6)alkynyl(C1-C6)alkyloxy), alkoxycarbonylalkyloxy; and

a carrier or diluent to combat and control insect pests at a locus.

3. A thiazole derivative of formula (1):

9

wherein R1 is cyano or fluoroalkyl (especially C1-C4 fluoroalkyl), R2 is halogen, SCN or aryl (especially phenyl, naphthyl, pyridinyl; being optionally substituted by one or more of halogen, alkyl, haloalkyl, alkoxy, nitro, alkylthio, or alkylsulfonyl), R3 is H, C1-C6 alkyl, SO2R5 or C(O)R6, R4 and R6 are, independently, aryl (especially phenyl, naphthyl, pyridinyl, pyrimidinyl, thienyl, furyl, thiazolyl, isothiazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiadiazolyl (1,2,4, and 1,3,4), oxadiazolyl (1,2,4 and 1,3,4); being optionally substituted by one or more of halogen, cyano, alkyl, haloalkyl, alkoxy, nitro, alkoxycarbonyl, alkylcarbonyloxy, alkylcarbonyl, amino, alkylamino, haloalkoxy, alkylthio, or alkylsulfonyl), R5 is alkyl (especially C1-C6 alkyl), haloalkyl (especially C1-C6 haloalkyl), X is O, S, NR7, R7 is alkyl (especially C1-C6 alkyl), cycloalkyl (especially C3-C6 cycloalkyl), alkoxy (especially C1-C6 alkoxy), alkenylalkyloxy (especially (C2-C6)alkenyl(C1-C6)alkyloxy), alkynylalkyloxy (especially (C2-C6)alkynyl(C1-C6)alkyloxy), alkoxycarbonylalkyloxy.

4. An insecticidal or acaricidal composition comprising a thiazole derivative of formula (1):

10

wherein R1 is cyano or fluoroalkyl (especially C1-C4 fluoroalkyl), R2 is halogen, SCN or aryl (especially phenyl, naphthyl, pyridinyl; being optionally substituted by one or more of halogen, alkyl, haloalkyl, alkoxy, nitro, alkylthio, or alkylsulfonyl), R3 is H, C1-C6 alkyl, SO2R5 or C(O)R6, R4 and R6 are, independently, aryl (especially phenyl, naphthyl, pyridinyl, pyrimidinyl, thienyl, furyl, thiazolyl, isothiazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiadiazolyl (1,2,4, and 1,3,4), oxadiazolyl (1,2,4 and 1,3,4); being optionally substituted by one or more of halogen, cyano, alkyl, haloalkyl, alkoxy, nitro, alkoxycarbonyl, alkylcarbonyloxy, alkylcarbonyl, amino, alkylamino, haloalkoxy, alkylthio, or alkylsulfonyl), R5 is alkyl (especially C1-C6 alkyl), haloalkyl (especially C1-C6 haloalkyl), X is O, S, NR7, R7 is alkyl (especially C1-C6 alkyl), cycloalkyl (especially C3-C6 cycloalkyl), alkoxy (especially C1-C6 alkoxy), alkenylalkyloxy (especially (C2-C6)alkenyl(C1-C6)alkyloxy), alkynylalkyloxy (especially (C2-C6)alkynyl(C1-C6)alkyloxy), alkoxycarbonylalkyloxy.

5. A process for preparing a compound of formula (1)

11

wherein R1 is cyano or fluoroalkyl (especially C1-C4 fluoroalkyl), R2 is halogen, SCN or aryl (especially phenyl, naphthyl, pyridinyl; being optionally substituted by one or more of halogen, alkyl, haloalkyl, alkoxy, nitro, alkylthio, or alkylsulfonyl), R3 is H, C1-C6 alkyl, SO2R5 or C(O)R6, R4 and R6 are, independently, aryl (especially phenyl, naphthyl, pyridinyl, pyrimidinyl, thienyl, furyl, thiazolyl, isothiazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiadiazolyl (1,2,4, and 1,3,4), oxadiazolyl (1,2,4 and 1,3,4); being optionally substituted by one or more of halogen, cyano, alkyl, haloalkyl, alkoxy, nitro, alkoxycarbonyl, alkylcarbonyloxy, alkylcarbonyl, amino, alkylamino, haloalkoxy, alkylthio, or alkylsulfonyl), R5 is alkyl (especially C1-C6 alkyl), haloalkyl (especially C1-C6 haloalkyl), X is O,

by reacting a compound of formula (2)

12

 with a R4C(O)Cl in the presence of an organic base or an inorganic base.

6. A process for preparing a compound of formula (1)

13

wherein R1 is cyano or fluoroalkyl (especially C1-C4 fluoroalkyl), R2 is halogen, SCN or aryl (especially phenyl, naphthyl, pyridinyl; being optionally substituted by one or more of halogen, alkyl, haloalkyl, alkoxy, nitro, alkylthio, or alkylsulfonyl), R3 is H, C1-C6 alkyl, SO2R5 or C(O)R6, R4 and R6 are, independently, aryl (especially phenyl, naphthyl, pyridinyl, pyrimidinyl, thienyl, furyl, thiazolyl, isothiazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiadiazolyl (1,2,4, and 1,3,4), oxadiazolyl (1,2,4 and 1,3,4); being optionally substituted by one or more of halogen, cyano, alkyl, haloalkyl, alkoxy, nitro, alkoxycarbonyl, alkylcarbonyloxy, alkylcarbonyl, amino, alkylamino, haloalkoxy, alkylthio, or alkylsulfonyl), R5 is alkyl (especially C1-C6 alkyl), haloalkyl (especially C1-C6 haloalkyl), X is O, S, NR7, R7 is alkyl (especially C1-C6 alkyl), cycloalkyl (especially C3-C6 cycloalkyl), alkoxy (especially C1-C6 alkoxy), alkenylalkyloxy (especially (C2-C6)alkenyl(C1-C6)alkyloxy), alkynylalkyloxy (especially (C2-C6)alkynyl(C1-C6)alkyloxy), alkoxycarbonylalkyloxy

by reacting a compound of formula (1) with phosphorous pentasulfide in a high boiling point solvent selected from the group consisting of pyridine, picoline, lutidine, xylene and sulfolane.