Enantioselective synthesis of natural biologically active ivaide A: 1,3-di-(R)-β-hydroxy-glyceride glycerol
摘要:
The natural 1,3-di-beta-hydroxy-glyceride glycerol ivaide A 1 from Ajuga iva has been synthesised by diacylation of dihydroxyacetone with 3-hydroxyhexadecanoic acid, followed by reduction to the corresponding glycerol derivative. The enantiomerically pure (R)-beta-hydroxyhexadecanoic ester intermediate 6 was obtained by a coupling reaction of an ethylacetoacetate dianion and the corresponding bromoalkyl, followed by the known reduction of the resulting beta-ketoester 5 by fermenting baker's yeast. (C) 1999 Elsevier Science Ltd. All rights reserved.