Nippon Chemical Industrial Co., Ltd.

Masao Takada

Shukichi Nabekawa

Katsuyuki Ogura

Yoshifusa Hara

Mutsuno Kato

Suchart Lilitkarntakul

Hiromu Tsuchiya

A method of preparing diarylchlorophosphate comprising the step of reacting alkyldiarylphosphate represented by formula (1) and thionyl chloride in the presence of a catalyst:

Method of preparing diarylchlorophosphate

o-Methoxy benzoic acid is produced by reacting chlorobenzoic acids having at least one chlorine atom at least at the ortho position with lower alcohol in the presence of a copper salt and a lower alkyl as a catalyst under moderate reaction conditions. o-Methoxy benzoic acid is useful as an intermediate for pharmaceutical, agricultural chemicals, and the like.

Method for producing o-alkoxybenzoic acid

A manufacturing method for an alkyldihalogenophosphine uses an alkyl halide and a trihalide of phosphorus as starting materials. A reaction product which is formed by an FC reaction is reduced by yellow phosphorus in the presence of iodine, whereby an alkyldihalogenophosphine is manufactured. A high-purity alkyldihalogenophosphine can be manufactured with a high yield by using an excess amount of a trihalide of phosphorus, which can act as a reaction solvent.

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Tokyo, Japan

Masao Takada