ABSOLUTE-CONFIGURATIONS OF 9,10-EPOXYDODECANOIC ACIDS BIOSYNTHESIZED BY MICROSOMES FROM JERUSALEM-ARTICHOKE TUBERS

9Z- and 9E-Dodecenoic acids were epoxidized by a microsome preparation from Jerusalem artichoke tuber to form cis- and trans-epoxydodecanoic acids, respectively. Steric analysis showed that (a) 78% of the cis-9,10-epoxydodecanoic acid had the 9R,10S configuration and 22% had the 9S,10R configuration and that (b) 57% of the trans-9,10-epoxydodecanoic acid had the 9S,10S configuration and 43% had the 9R,10R configuration.