Microbial process for producing cholanic acid derivatives
申请人:Kuraray Co., Ltd.
公开号:US04359529A1
公开(公告)日:1982-11-16
A microbial process for producing a cholanic acid derivative of the formula: ##STR1## wherein X is ##STR2## or .dbd.O; and R is hydrogen, an alkali metal or an alkaline earth metal, which comprises cultivating a microbe which is capable of growing in a medium containing cholic acid or a salt thereof as a substrate to produce the cholanic acid derivative, selected from the genera Arthrobacter, Brevibacterium and Corynebacterium, in a culture medium containing the substrate and collecting the resulting derivative.
7alpha-, 12alpha-, 12beta-Hydroxy and 7alpha,12alpha- and 7alpha,12beta-dihydroxy-3-ketocholanoic acids were prepared in satisfactory yields protecting the 3-keto group as dimethyl ketal and subsequent reduction with sodium borohydride of the corresponding 7- and 12-oxo functionalities. The same procedure gave also 3,12-diketo-7alpha-hydroxy-cholanoic acid.