Studies on the biomimetic preparation of the sarpagan ring system. Attempts to apply the spontaneous “biogenetic-type cyclization” of van Tamelen to bond formation between C-5 and C-16 in the corynantheine series
作者:Mauri Lounasmaa、Pirjo Hanhinen
DOI:10.1016/s0040-4020(96)00928-3
日期:1996.11
Attempts were made to apply the spontaneous “biogenetic-typecyclization” of van Tamelen to the preparation of the sarpagan ring system by utilizing indolo [2,3-a]quinolizidines 10, 11, 12, and 14. The fact that the spontaneous “biogenetic-typecyclization” did not take place casts some doubt on the correctness of the earlier results.