GENERATION AND CYCLIZATION OF NITRILIUM IONS FROM AMIDES. ASYMMETRIC SYNTHESIS OF FUSED AZABICYCLICS

Article abstract of DOI:10.1016/S0040-4039(00)84451-2

Treatment of 2^o 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 vi