名称:
Stereochemistry of the microbial generation of .delta.-decanolide, .gamma.-dodecanolide, and .gamma.-nonanolide from C18 13-hydroxy, C18 10-hydroxy, and C19 14-hydroxy unsaturated fatty acids
摘要:
(S)-delta-Decanolide (4) was isolated from cultures of Cladosporium suaveolens after the microorganism was fed either (S)- or (R,S)-coriolic acid (1). Feeding (R,S)-10-hydroxyoctadec-(8E)-enoic acid (2) to Yarrowia lipolytica produced (S)-gamma-dodecanolide. When (S)-homocoriolic acid (3) was fed to C.suaveolens, gamma-nonalide slightly enriched in the S enantiomer was produced. At some stage in the biodegradation of 3, an inversion of configuration, from S to R, occurred and was accompanied by the loss of the hydrogen atom originally present on C-14, as GLC/MS analysis of the products of feeding C. suaveolens with dideuterated 10 showed.