Abstract: A process for the production of a boronic acid of formula III, ##STR1## in which an organometallic of formula IV, ##STR2## in which formula IV, M represents a metallic moiety such as --MgX, X being a halogen or an alkali metal is treated with a trialkoxy borane of formula B(OR).sub.3, R representing an alkyl group and the product is hydrolysed.

Abstract: Pesticidal compounds of formula II: R.sub.A CR.sub.3 .dbd.CR.sub.4 CHDR.sub.Bin which formula:R.sub.A represents a group ArCR.sub.1 R.sub.2 - in which Ar represents a phenyl or naphthyl group optionally substituted by one or more halogen, alkoxy, haloalkoxy, methylenedioxy, C.sub.1 -C.sub.6 alkyl or haloalkyl groups;R.sub.1 and R.sub.2 together with the carbon to which they are attached represent a C.sub.3 -C.sub.6 cycloalkyl group optionally substituted by one or more halogen atoms or C.sub.1 -C.sub.6 alkyl groups.R.sub.3 and R.sub.4 which may be identical or differ, represent hydrogen halogen or C.sub.1 -C.sub.6 alkyl groups andR.sub.B represents the residue of an alcohol R.sub.B CHDOH in which D is hydrogen or cyano and of which the [1R, cis] 2,2-dimethyl-3-(2,2-dibromovinyl) cyclopropane carboxylic ester is significantly insecticidal,the configuration of R.sub.A and CHDR.sub.

Abstract: A process for the production of a boronic acid of formula III, ##STR1## in which an organometallic of formula IV, ##STR2## in which formula IV, M represents a metallic moiety such as --MgX, X being a halogen or an alkali metal is treated with a trialkoxy borane of formula B(OR).sub.3, R representing an alkyl group and the product is hydrolyzed.

Abstract: New insecticides are of formula: ##STR1## wherein R.sup.1 represents hydrogen or a methyl group; R.sup.2 represents hydrogen or a halogeno or lower alkyl group; R.sup.3 represents hydrogen or a halogen, lower alkyl (which is difference to R.sup.2 when R.sup.2 represents a lower alkyl group) or carboloweralkoxy group which contains at least 2 carbon atoms in the lower alkoxy residue when R.sup.2 represents methyl or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent a cycloalkylene ring having at least one endocyclic carbon to carbon double bond; with the proviso that (a) R.sup.2 and R.sup.3 each represent hydrogen only when R.sup.1 represents methyl and (b) R.sup.3 contains at least 2 carbon atoms when R.sup.1 and R.sup.2 each represent hydrogen; and R represents a group which form insecticidal esters with chrysanthemic acid e.g. 5-benzyl-3-furylmethyl, 3-phenoxybenzyl, .alpha.-cyano-3-phenoxybenzyl.

Abstract: A compound of formula II: ArCHR.sub.1 CO.sub.2 CHDR.sub.2in which formula:Ar represents a phenyl or naphthyl group optionally substituted by one or more halogen, alkoxy, haloalkoxy, methylenedioxy, C.sub.1 -C.sub.6 alkyl or haloalkyl groups;R.sub.1 represents the group --CH(CF.sub.3)CH.sub.3 or --C(CF.sub.3).dbd.CH.sub.2R.sub.2 represents the residue of an alcohol R.sub.2 CHDOH in which D is hydrogen or cyano and of which the [1R, cis]2,2-dimethyl-3-(2,2-dibromovinyl)cyclopropane carboxylic ester is significantly insecticidal.

Abstract: A compound of formula I ##STR1## in which formula: D represents hydrogen or a cyano group;X represents halogen;A represents an alkyl group (typically a C.sub.1 -C.sub.6 alkyl group);n is 0 to 4;RCOO. represents a residue of an acid RCO.sub.2 H, which acid, or an ester-forming derivative of which acid, on reaction with .alpha.-cyano-3-phenoxybenzyl alcohol or an ester-forming derivative thereof, give rise to an .alpha.-cyano-3-phenoxybenzyl ester having pesticidal properties.

Abstract: A compound of the formula: ##STR1## wherein Y represents OH or a halogeno group;D represents hydrogen or a cyano group;B represents hydrogen or a methyl, ethyl or vinyl group;A represents methyl;n is 0, 1 or 2;with the proviso that(1) when the CH.sub.2 CH.dbd.CHB group is in the 4-position with respect to the CHDY group, then D must be hydrogen and B must be methyl, ethyl or vinyl and the configuration about the double bond in the CH.dbd.CHB group must be Z and(2) when the group CH.dbd.CHB is in the 3-position with respect to the CHDY group and D is CN then n must be 0 and(3) when the group CH.sub.2 CH.dbd.CHB is in the 2 or 3-position with respect to the CHDY group, then D is CN, are useful in the production of pesticidal esters of chrysanthemic and related acids.

Abstract: Pesticidal compounds of formula IR.sub.A CR.sub.3 .dbd.CR.sub.4 CHDR.sub.B Iin which formula:R.sub.A represents a group ArCR.sub.1 R.sub.2 --in which Ar represents a phenyl or naphthyl group optionally substituted by one or more halogen, alkoxy, haloalkoxy, methylenedioxy, C.sub.1 -C.sub.6 alkyl or haloalkyl groups;R.sub.1 and R.sub.2 together with the carbon to which they are attached represent a C.sub.3 -C.sub.6 cycloalkyl group optionally substituted by one or more halogen atoms or C.sub.1 -C.sub.6 alkyl groups.R.sub.3 and R.sub.4 which may be identical or differ, represent hydrogen halogen or C.sub.1 -C.sub.6 alkyl groups andR.sub.B represents the residue of an alcohol R.sub.B CHDOH in which D is hydrogen or cyano and of which the [1R, cis]2,2-dimethyl-3-(2,2-dibromovinyl) cyclopropane carboxylic ester is significantly insecticidal,the configuration of R.sub.A and CHDR.sub.

Abstract: A compound of Formula I: ##STR1## wherein: Ar represents a polynuclear carboxyclic or heterocyclic fused ring system having at least one carbocylic or heterocyclic ring of aromatic character, the polynuclear ring system optionally carrying one or more of the substituents halogen, C.sub.1 -C.sub.6 alkyl --CF.sub.3, or --OCF.sub.y H.sub.3-y, wherein y is 0-3;n is 0 or 1 and m is 1-11Z represents a group of Formula: ##STR2## wherein: R.sub.A and R.sub.B which may be identical or different each represent hydrogen or methyl;R.sub.C represents methyl;R.sub.D represents methyl, ethyl, n-propyl, isopropyl, t-butyl, or vinyl; andR.sub.E represents hydrogen or methyl or wherein:R.sub.C and R.sub.D together with C.sub..beta. form a cyclopropane or a cyclobutane ring or goether form a methylene group (.dbd.CH.sub.2) or wherein:R.sub.A and R.sub.B together with C.sub..alpha. and C.sub..beta. form a cyclobutane ring.

Abstract: A compound of formula IIR.sub.A CH.sub.2 COCHDR.sub.bin which formula:R.sub.A represents a group ArCR.sub.1 R.sub.2 -- in which Ar represents a phenyl or naphthyl group optionally substituted by one or more halogen, alkoxy, haloalkoxy, methylenedioxy or C.sub.1 -C.sub.6 alkyl or haloalkyl groups;R.sub.1 and R.sub.2 together with the carbon to which they are attached jointly represent a C.sub.3 -C.sub.6 cycloalkyl group optionally substituted by one or more halogen atoms or C.sub.1 -C.sub.6 cycloalkyl groups andR.sub.B represents the residue of an alcohol R.sub.B CHDOH in which D is hydrogen or cyano and of which the [IR, cis]2,2-dimethyl-3-(2,2-dibromovinyl)cyclopropane carboxylic ester is signficantly insecticidal.

Abstract: A compound of formula I ##STR1## in which formula: R.sub.a represents hydrogen or a C.sub.1 -C.sub.6 alkyl group, and R.sub.c represents a C.sub.1 -C.sub.6 alkyl group;R.sub.b represents a phenyl group, optionally substituted by a C.sub.1 -C.sub.6 alkyl group or halogen, a group of formula --CH.dbd.CR.sub.d R.sub.e in which R.sub.d and R.sub.e, which may be identical or different represent hydrogen or C.sub.1 -C.sub.6 alkyl groups or a group of formula --CH.dbd.NOR.sub.f in which R.sub.f represents hydrogen or a C.sub.1 -C.sub.6 alkyl group andRCOO represents a residue of an acid RCO.sub.2 H, which acid, or an ester-forming derivative of which acid, on reaction with .alpha.-cyano-3-phenoxybenzyl alcohol or an ester forming derivative thereof, gives rise to an .alpha.-cyano-3-phenoxybenzyl ester having pesticidal properties.

Abstract: A compound of formula I: ##STR1## in which formula: D represents hydrogen or a cyano group;X represents halogen;A represents an alkyl group (typically a C.sub.1 -C.sub.6 alkyl group);n is 0 to 4;RCOO. represents a residue of an acid RCO.sub.2 H, which acid, or an ester-forming derivative of which acid, on reaction with .alpha.-cyano-3-phenoxybenzyl alcohol or an ester-forming derivative thereof, gives rise to an .alpha.-cyano-3-phenoxybenzyl ester having pesticidal properties.

Abstract: Pesticidal compounds have the formula: ##STR1## wherein D represents hydrogen or a cyano groupX represents chlorine or bromineA represents an alkyl groupn is 0 or an integer of 1-4 andRCOO is the residue of an acid RCOOH whose .alpha.-cyano-3-phenoxybenzyl ester has pesticidal properties. They are prepared by esterification methods.

Abstract: New insecticides are of formula: ##STR1## wherein R.sup.1 represents hydrogen or a methyl group; R.sup.2 represents hydrogen or a halogeno or lower alkyl group; R.sup.3 represents hydrogen or a halogeno or carbo(lower alkoxy) group which contains at least 2 carbon atoms in the lower alkoxy residue when R.sup.2 represents methyl; with the proviso that (a) R.sup.2 and R.sup.3 each represent hydrogen only when R.sup.1 represents methyl, (b) when R.sup.1 and R.sup.3 each represent hydrogen and R.sup.2 represents alkyl, that alkyl group contains at least 2 carbon atoms and (c) when R.sup.3 represents halogeno, R.sup.2 represents hydrogen or halogeno; and R represents a group which forms insecticidal esters with chrysanthemic acid e.g. 5-benzyl-3-furylmethyl, 3-phenoxybenzyl, .alpha.-cyano-3-phenoxybenzyl.

Abstract: Pesticidal compounds have the formula: ##STR1## wherein D represents hydrogen or a cyano or ethynyl group;B represents hydrogen or an alkyl or alkenyl group;A represents an alkyl group or a halogeno group or a CF.sub.3 group;n is 0 or an integer of 1-4; andRCOO is the residue of an acid RCOOH which is a 2,2-dimethyl-cyclopropane carboxylic acid carrying at the 3-position a dihalovinyl, an alkenyl or a carboalkoxyalkenyl group, provided that (1) when the group --CH.sub.2 CH.dbd.CHB is located at the 4-position on the ring with respect to the ester linkage, then D must be hydrogen and the group carried at the 3-position on the cyclopropane ring of the acid must be a dihalovinyl group and (2) when the group --CH.sub.2 CH.dbd.CHB is located at the 3-position on the ring and D is a CN group, then n must be 0.

Abstract: Pesticidal compounds have the formula: ##STR1## wherein D represents hydrogen or a cyano group or an ethynyl group R.sub.a represents alkylA represents an alkyl group or a halogeno or trifluoromethyl groupn is 0 or an integer of 1-4, b is 0 or 1andRCOO is the residue of an acid RCOOH whose .alpha.-cyano-3-phenoxybenzyl ester has pesticidal properties. They are prepared by esterification methods.

Abstract: New pesticidal e.g. insecticidal, compounds are of formula ##STR1## wherein X represents hydrogen, halogeno or an alkyl group, Z represents hydrogen, an alkyl group or a cyano or ethynyl group and R represents the residue of a carboxylic acid RCOOH which is an acid forming a pesticidal compound when esterified with .alpha.-cyano-3-phenoxybenzyl alcohol.The compounds can be prepared by conventional methods e.g. esterification.

Abstract: New insecticides are of formula: ##STR1## wherein R.sup.1 represents hydrogen or a methyl group; R.sup.2 represents hydrogen or a halogeno or lower alkyl group; R.sup.3 represents hydrogen or a halogeno or carbo(lower alkoxy) group which contains at least 2 carbon atoms in the lower alkoxy residue when R.sup.2 represents methyl; with the proviso that (a) R.sup.2 and R.sup.3 each represent hydrogen only when R.sup.1 represents methyl, (b) when R.sup.1 and R.sup.3 each represent hydrogen and R.sup.2 represents alkyl, that alkyl group contains at least 2 carbon atoms and (c) when R.sup.3 represents halogeno, R.sup.2 represents hydrogen or halogeno; and R represents a group which forms insecticidal esters with chrysanthemic acid e.g. 5-benzyl-3-furylmethyl, 3-phenoxybenzyl, .alpha.-cyano-3-phenoxybenzyl.

Abstract: New insecticides are of general formula: ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 represent H or methyl, R.sup.6 represents alkyl, alkoxy, halogeno or nitro or two R.sup.6 groups together represent methylenedioxy, and R is a group forming insecticidal esters with chrysanthemic acid such as 5-benzyl-3-furylmethyl, 3-phenoxybenzyl or .alpha.-cyano-3-phenoxybenzyl. They are prepared by esterification methods.