Sumitomo Chemical Company, Limited

Ayumi Inoue

Motoo Hazama

Yoshiki Takashima

Junko Kudo

There is provided a process for producing an optically active N-substituted azetidine-2-carboxylic acid compound represented by the formula (2): ##STR1## by contacting a corresponding N-substituted azetidine-2-carboxylic acid ester of formula (2) with an enzyme derived from a microorganism selected from Arthrobacter SC-6-98-28 strain, Arthrobacter sp. ATCC21908 strain, Chromobacterium SC-YM-1 strain, and a mutant thereof. A process is also provided for preparing an optically active azetidine-2-carboxylic acid by eliminating the N-substituent of a N-substituted azetidine-2-carboxylic acid ester of formula (2).

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Nishinomiya, Japan

Ayumi Inoue