Abstract: Process for the preparation of anilines substituted in the meta-position by a halogen atom.An aniline of the formula: ##STR1## in which: X' and X", R', R" and R"' are a halogen atom, alkyl (C.sub.1 -C.sub.4) or alkoxy (C.sub.1 -C.sub.4), one of the symbols X and one of the symbols R necessarily being a halogen and it being possible for one of the symbols X and one of the symbols R to be a hydrogen atom,is subjected to catalytic hydrogenation, in an anhydrous organic liquid phase, namely a chlorobenzene phase, in the presence of a halogen-containing hydracid and of a noble metal from group VIII of the periodic classification.
Abstract: Aniline derivatives of the general formula: ##STR1## wherein X represents a halogen atom or a lower alkyl, lower alkoxy, lower alkenyl, lower alkenyloxy, lower alkyl substituted by one or more halogen atoms, nitro or cyano group or an amino group unsubstituted or substituted by one or two lower alkyl groups, which may be the same or different, or by a group --CO--R.sup.1 (wherein R.sup.1 represents a lower alkyl, lower alkoxy, mono (lower) alkylamino group or di (lower) alkylamino group wherein the lower alkyl groups may be the same or different), n represents 0 or an integer from 1 to 5 inclusive, it being understood that when n represents an integer from 2 to 5 inclusive, atoms or groups represented by X may be the same or different, and Q represents a group of the general formula: ##STR2## wherein R.sup.2 and R.sup.3 may be the same or different and each represents a hydrogen atom or a lower alkyl group, and R.sup.4 represents a cyano group or a group --COR.sup.5, wherein R.sup.
Type:
Grant
Filed:
July 14, 1981
Date of Patent:
January 15, 1985
Assignee:
Rhone-Poulenc Agrochimie
Inventors:
Francois de Reinach Hirtzbach, Dominique Ambrosi
Abstract: 1. Process for the manufacture of N-substituted 1-carbamoyl-3-(3,5-dichlorophenyl)-hydantoins of the formula: ##STR1## in which R.sub.1 =alkyl (C.sub.1 -C.sub.4) or phenyl and R.sub.2 =H or alkyl (C.sub.1 -C.sub.4).2. This process comprises two steps:a. reacting phosgene with 3-(3,5-dichlorophenyl)-hydantoin in an inert organic solvent medium, in the presence of an acid acceptor, in order to form 1-chlorocarbonyl-3-(3,5-dichlorophenyl)-hydantoin, andb. reacting the chlorocarbonyl formed with an amine HNR.sub.1 R.sub.2 in an inert organic solvent, in the presence of an acid acceptor.3. This process makes it possible to obtain the products I, which can be used as agricultural fungicides, with good yields.
Abstract: Compounds having the formula ##STR1## in which R is alkyl of 1 to 8 carbon atoms, haloalkyl of 1 to 8 carbon atoms, alkenyl of 2 to 8 carbon atoms, haloalkenyl of 2 to 8 carbon atoms, alkynyl of 2 to 8 carbon atoms or haloalkynyl of 2 to 8 carbon atoms;R.sub.1 is aryl;R.sub.2 is tertiary alkyl of 4 to 8 carbon atoms; are disclosed as well as their use as insecticides and nematocides, e.g., in controlling corn rootworm and Southern Armyworm.
Abstract: Compounds having the formula ##STR1## in which R is an alkyl of 1 to 8 carbon atoms, haloalkyl of 1 to 8 carbon atoms, alkenyl of 2 to 8 carbon atoms, haloalkenyl of 2 to 8 carbon atoms, alkynyl of 2 to 8 carbon atoms, or haloalkynyl of 2 to 8 carbon atoms;R.sub.1 is an alkyl of 1 to 8 carbon atoms; andR.sub.2 is tertiary alkyl of 4 to 8 carbon atoms; are disclosed as well as their use as insecticides and nematocides, e.g. in controlling Corn rootworm and Southern Armyworm.
Abstract: This invention provides synergistic herbicidal compositions of glycolate and lactate esters of phenoxybenzoic acids with cyclohexonediones. These compositions are relatively safe to soybeans and have unexpected herbicidal effectiveness against broadleaf weeds such as velvetleaf.
Abstract: There is provided herbicidal arylsulfonamide derivatives of phenoxybenzoic acids. These compounds are particularly useful when applied in a post-emergence application to soybean fields containing broadleaf weeds.
Abstract: Process for the preparation of optionally hydroxymethylated 6-chlorobenzoxazolone, which consists in chlorinating and, if appropriate, hydroxymethylating benzoxazolone in a mixture of water+dioxane.
Abstract: Compounds having the formula ##STR1## in which R is an alkyl of 1 to 8 carbon atoms, haloalkyl of 1 to carbon atoms, alkenyl of 2 to 8 carbon atoms, haloalkenyl of 2 to 8 carbon atoms, alkynyl of 2 to 8 carbon atoms, or haloalkynyl of 2 to 8 carbon atoms;R.sub.1 is an alkyl of 1 to 8 carbon atoms; andR.sub.2 is tertiary alkyl of 4 to 8 carbon atoms are disclosed as well as their use as insecticides and nematocides, e.g. in controlling corn rootworm and Southern Armyworm.
Abstract: Process for the selective preparation of meta-chloroanilines.It is carried out by the hydrodechlorination of polychloroanilines or polychloronitrobenzenes with hydrogen, in the liquid phase, under the action of heat, at atmospheric pressure or under pressure, in the presence of a noble metal, in an anhydrous organic medium and in the presence of a Lewis acid.These meta-chloroanilines are intermediates especially for active plant-protection substances.
Abstract: (1) Process for the manufacture of 2,6-dichloro-4-nitroaniline.(2) This process consists in chlorinating paranitroaniline, with chlorine gas, in an aqueous solution of hydrochloric acid having a concentration of between 4 and 7.5 N, at the boil, at a temperature between 95.degree. and 110.degree. C.(3) This process makes it possible to obtain 2,6-dichloro-4-nitroaniline with an improved yield and an improved quality of product.
Type:
Grant
Filed:
May 13, 1981
Date of Patent:
November 8, 1983
Assignee:
Rhone-Poulenc Agrochimie
Inventors:
Michel Aubouy, Pierre Hamel, Marc Molin
Abstract: There is provided a method for preventing corrosion in a glass-lined vessel due to HF liberated from an organic liquid medium. The method involves adding CaCl.sub.2 particles to this medium. This method is particularly useful in the chlorination of 4-chlorobenzotrifluoride to 3,4-dichlorobenzotrifluoride.
Abstract: Compounds useful as intermediates for insecticides and nematocides having the formula ##STR1## in which R is an alkyl of 1 to 8 carbon atoms, haloalkyl of 1 to 8 carbon atoms, alkenyl of 2 to 8 carbon atoms, haloalkenyl of 2 to 8 carbon atoms, alkynyl of 2 to 8 carbon atoms, or haloalkynyl of 2 to 8 carbon atoms;R.sub.1 is tertiary alkyl of 4 to 8 carbon atoms; andX is halogenare disclosed as well as their preparation by direct reaction of an alkylphosphonic dihalide with a tertiary-alkyl thiol.
Abstract: Compounds having the formula ##STR1## in which R is an alkyl of 1 to 8 carbon atoms, haloalkyl of 1 to 8 carbon atoms, alkenyl of 2 to 8 carbon atoms, haloalkenyl of 2 to 8 carbon atoms, alkynyl of 2 to 8 carbon atoms, or haloalkynyl of 2 to 8 carbon atoms;R.sub.1 is tertiary alkyl of 4 to 8 carbon atoms; andR.sub.2 and R.sub.3, independently are hydrogen, alkyl of 1 to 8 carbon atoms or cycloalkyl are disclosed as well as their use as insecticides and nematocides, e.g., in controlling Corn rootworm and Southern Armyworm.
Abstract: This invention provides compounds having the formula: ##STR1## wherein R and R' are the same or different C.sub.1 -C.sub.3 n-alkyl and R" is C.sub.3 -C.sub.4 branched alkyl. It also provides for a method of corn rootworm control with such compounds.
Abstract: 2-nitro-5-(substituted-phenoxy)benzoic acids and esters salts, amides and acyl halides thereof comprise a class of compounds that are highly effective herbicides.