Determination of the absolute configuration of vibsanin F by asymmetric synthesis via π-allylpalladium complex
作者:Hiroaki Yuasa、Gouki Makado、Yoshiyasu Fukuyama
DOI:10.1016/s0040-4039(03)01537-5
日期:2003.8
The absolute configuration of vibsanin F (1), one of the simplest 11-membered ring vibsane-type diterpene, was established to be 6R, 7S and 11S by asymmetric synthesis. A diastereomer (1a) with a 6S, 7S and 11S configuration was synthesized starting from myrcene by procedures featuring a Sharpless asymmetric epoxidation and a high diastereoselective eleven-membered ring formation between a pi-allylpalladium complex and a beta-ketoester nucleophile. Subsequent reduction of epoxide in la with LiAlH4 gave a diol, which was identical with that derived from vibsanin F. (C) 2003 Elsevier Ltd. All rights reserved.