Piperidines via Ammonium Ylide [1,2]-Shifts: A Concise, Enantioselective Route to (-)-Epilupinine from Proline Ester
作者:F. G. West、B. N. Naidu
DOI:10.1021/ja00097a081
日期:1994.9
A short, enantioselective synthesis of (−)-epilupinine from proline via a spirocyclic ammonium ylide
作者:B.N. Naidu、F.G. West
DOI:10.1016/s0040-4020(97)01037-5
日期:1997.12
quinolizidine 8b with high diastereoselectivity (19:1 8b/7b) and in surprisingly high enantiomeric excess (75%). The key step presumably occurs via spirocyclic ylide 6b, which undergoes [1,2]-shift with retention. Rearrangement product 8b was converted to (−)-epilupinine 2 via an efficient, 3-step sequence.