摘要:
The enantioselective synthesis of the C-14 to C-5 cyclopentane segment of jatrophane diterpenes is reported. An Evans aldol addition, a Horner-Wadsworth-Emmons olefination and a thermal intramolecular carbonylene reaction of an alpha-keto ester served as key C/C-connecting transformations. (C) 2003 Elsevier Ltd. All rights reserved.