New Synthetic Approach to Enantiopure Bicyclic Sulfonium Salts: Swainsonine Analogues
作者:Vanda Cerè、Salvatore Pollicino、Alfredo Ricci
DOI:10.1021/jo020511z
日期:2003.4.1
The enantioselective synthesis of bicyclic sulfonium salts 8 or 9, thioanalogues of swainsonine derivatives, is described. The synthetic strategy is based on a stereo- and regiospecific transannular cyclization reaction of nine-membered cyclic sulfides, mediated by Me(3)SiI or carried out under acidic catalysis.