1994 年 58 巻 6 号 p. 1054-1057
The transformation of schizandrin (I) into gomisin A (II) was accomplished by use of a combination of biotransformation and chemical reactions. The biotransformation, microbial O-demethylation of I by Cunninghamella echinulata var. elegans (ATCC 9245) produced two novel metabolites [3-norschizandrin (IV) and 2-norschizandrin (VI)] and two known metabolites [gomisin T (III) and 13-norschizandrin (V)]. Among those metabolites, compound III was derived to II by the O-demethylation with a Lewis acid in the presence of an acid scavenger, followed by methylenation.
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