PROCESS FOR PRODUCTION OF TRANS-2,2-DIMETHYL- 3-FORMYLCYCLOPROPANE CARBOXYLIC ACID ESTER

WIPO Patent Application WO/2008/020639

A1

A process for producing a trans-2,2-dimethyl-3- formylcyclopropane carboxylic acid ester, comprising the steps of: (A) preparing a mixture containing a trans-2,2-dimethyl-3-(hydroxymethyl)cyclopropane carboxylic acid ester; (B) oxidizing the mixture obtained in the step (A) to produce a mixture containing a crude product of the trans-2,2-dimethyl-3-formylcyclopropane carboxylic acid ester; (C) contacting the mixture obtained in the step (B) with an aqueous solution of an alkali metal bisulfite to produce an alkali metal salt of a trans-2,2-dimethyl- 3-[(hydroxy)(sulfo)methyl]cyclopropane carboxylic acid ester; and (D) contacting the alkali metal salt obtained in the step (C) with a base or the like to produce the trans-2,2-dimethyl-3-formylcyclopropane carboxylic acid ester.

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ITAGAKI, Makoto (1-16-3, Aoyama Katano-sh, Osaka 66, 5760066, JP)
板垣誠 (〒66 大阪府交野市青山１－１６－３ Osaka, 5760066, JP)
MINAMIDA, Ryo (2-3-C-115, Yamatehigashi Kyotanabe-sh, Kyoto 57, 6100357, JP)

JP2007/066068

February 21, 2008

August 13, 2007

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SUMITOMO CHEMICAL COMPANY, LIMITED (27-1, Shinkawa 2-chome Chuo-k, Tokyo 60, 1048260, JP)
住友化学株式会社 (〒60 東京都中央区新川二丁目２７番１号 Tokyo, 1048260, JP)
ITAGAKI, Makoto (1-16-3, Aoyama Katano-sh, Osaka 66, 5760066, JP)
板垣誠 (〒66 大阪府交野市青山１－１６－３ Osaka, 5760066, JP)

C07C67/40

ENOMOTO, Masayuki et al. (Limited 5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 50, 5418550, JP)

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