Treatment of the bicyclic iminium ion derived from 5-methoxyhexahydroindoli
zidin-3-one with allyltrimethylsilane gave exclusively the diastereoisomer
in which the allyl group was axial. This substrate is a useful precursor to
5-propyl-3-alkylindolizidine alkaloids. (C) 1999 Elsevier Science Ltd. All
rights reserved.