Sumitomo Chemical Company, Limited

Yoshitaka Ume

Takashi Matsuo

Nobuo Ohno

Toshio Mizutani

Nobushige Itaya

Shigeyoshi Kitamura

Fujio Masuko

Takeaki Umemura

Kazuhiko Fujiyoshi

Shinji Nakai

A process for producing 3-methyl-2-(4-halophenyl)butyronitrile, which is an important intermediate for the production of insecticides, in a high yield and a high purity even on a commercial scale comprising reacting a p-halophenylacetonitrile having a p-halobenzyl alcohol content of not more than 1.0 % by weight, with an isopropyl halide having an isopropyl alcohol content of not more than 1.0 % by weight.

Process for producing a 3-methyl-2-(4-halophenyl)butyronitrile

A process for preparing m-phenoxybenzyl, m-phenoxybenzal halides or a mixture thereof comprising halogenating m-phenoxytoluene in the presence of a phosphorus halide in the high temperature region above 220.degree. C, and a process for preparing m-phenoxybenzylalcohol comprising halogenating m-phenoxytoluene as above, reacting the resulting side-chain halogenated m-phenoxytoluene with an alkali metal salt of acetic acid and then (a) reducing and hydrolyzing the resulting m-phenoxybenzylacetate and m-phenoxybenzaldehyde, or (b) reducing the resulting m-phenoxybenzylacetate and m-phenoxybenzaldehyde, reacting the resulting product with acetic anhydride and an alkali metal salt of acetic acid and hydrolyzing the resulting m-phenoxybenzylacetate are disclosed.

Process for preparing m-phenoxybenzylalcohol and side-chain halogenated

A process for preparing an organic acid ester of the formula (I), ##EQU1## wherein R.sub.1 is a hydrogen atom or a methyl group, R.sub.2 is a methyl group, a vinyl group, a 2,2-dichlorovinyl group, a 1-propenyl group, a 2-methyl-1-propenyl group, a 2-carbomethoxy-1-propenyl group, a 2-methoxymethyl-1-propenyl group, a 1,3-butadienyl group, a 2-methyl-1,3-butadienyl group or a cyclopentylidenemethyl group when R.sub.1 is a hydrogen atom, and R.sub.2 is a methyl group when R.sub.1 is a methyl group; which comprises reacting an acid of the formula (II), ##EQU2## wherein R.sub.1 and R.sub.2 are each as defined above, or its reactive derivative, or mixture of the acid and its reactive derivative with a quaternary ammonium salt of the formula (III), ##SPC1## wherein X is a halogen atom, A is an alkylamine, pyridine or an N-alkylaniline.

Process for preparing cyclopropane-carboxylic acid esters

A process for preparing a substituted phenyl-acetic acid ester of the formula (I), ##SPC1## wherein R.sub.1 is an ethyl group or an isopropyl group, R.sub.2 is a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group, a methoxy group, a halogen atom or a methylenedioxy group, which comprises reacting a quaternary ammonium salt of the formula (III), ##SPC2## wherein X is a halogen atom, and A is an alkylamine, pyridine or an N-alkylaniline, with a carboxylic acid of the formula (II), ##SPC3## wherein R.sub.1 and R.sub.2 are each as defined above, its reactive derivative, or a mixture of the acid and its reactive derivative.

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Toyonaka, Japan

Yoshitaka Ume