PREPARATION OF CYCLOPENTANONECARBOXYLIC ACID ESTER DERVATIVES

Title:

PREPARATION OF CYCLOPENTANONECARBOXYLIC ACID ESTER DERVATIVES

Document Type and Number:

Japanese Patent JPS5277035

Kind Code:

A

Abstract:

PURPOSE: Cyclopentanonecarboxylic acid ester derivatives I, II (R1 is H or alkyl;R2 is H, alkyl or alkoxycarbonyl;R3 is alkyl; R4 is alkyl or benzyl), e.g. 2,2-dimethyl-4-carboethoxymethylene-5-oxo-cyclopentane-1,3-dicarboxylic acid demethylester, 2,2-dimethyl-4-carboethoxymethyl-5-oxo-cyclopento-3-ene1,3-dicarboxylic acid dimethylester.

Inventors:

SAKAI KIYOSHI
IDE SUMINARI
INOUE KENJI

Application Number:

JP15300775A

Publication Date:

June 29, 1977

Filing Date:

December 22, 1975

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Assignee:

SANKYO CO

International Classes:

C07D307/935; C07C67/00; C07C67/30; C07C69/757; C07C69/95; C07C401/00; C07C405/00; C07D307/93; (IPC1-7): C07C67/30; C07C69/95; C07D307/93

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