名称:
Enzymatic desymmetrization of meso cis,cis-2,4,6-substituted tetrahydropyrans
摘要:
The stereoselective acylation of meso-tetrahydropyrans 6 and 7 by enol eaters (vinyl acetate or isopropenyl acetate) in the presence of Candida antarctica lipase in organic media gave the corresponding (2R,4S,6S)monoesters 10 and 11 in high enantiomeric purity. The hydrolysis of the corresponding diacetate derivatives 8 and 9 in the presence of the same enzyme provided the opposite enantiomers, (2S,4R,6R)-monoesters 10 and 11. (C) 1998 Elsevier Science Ltd. All rights reserved.