Generation and cyclization of nitrilium ions from amides. Asymmetric synthesis of fused azabicyclics
作者:Robert E. Gawley、Sanjay Chemburkar
DOI:10.1016/s0040-4039(00)84451-2
日期:1986.1
Treatment of 2° amides with PPSE affords nitrilium ions which may be cyclized onto appropriate terminators. The conditions are compatible with esters in the molecule, and further elaboration to pyrrolizidine and indolizidine rings is possible via asymmetric reduction.
用PPSE处理2°酰胺可得到硝氮离子,可将其环化成合适的终止剂。该条件与分子中的酯相容,并且可以通过不对称还原进一步加工成吡咯烷并环和吲哚并立环。