Total Synthesis of 20-Norsalvinorin A. 1. Preparation of a Key Intermediate
作者:Ylva E. Bergman、Roger Mulder、Patrick Perlmutter
DOI:10.1021/jo802623n
日期:2009.3.20
tricylic intermediate 3a, for the total synthesis of the C20-nor analogue of salvinorin A, was prepared in seven steps from 3-furaldehyde. Key steps involved a highly regio- and diastereoselective Lewis acid assisted Diels−Alderreaction followed by base-promoted epimerization and a completely stereoselective conjugate reduction.