摘要:
Both enantiomers of 13-pentadecanolide and 15-heptadecanolide, higher analogues of galbanum macrolides, were prepared via ring enlargement of cyclodecanone and cyclododecanone, respectively. Conversion of the intermediate oxo lactones to methylenated ethyl galbanum macrolides by Wittig olefination shifted the olfactory properties dramatically. (C) 1999 Elsevier Science Ltd. All rights reserved.