Synthesis of the perhydroindole nucleus by a Pummerer/Mannich induced cyclization cascade
作者:Albert Padwa、Alex G. Waterson
DOI:10.1016/s0040-4039(98)01964-9
日期:1998.11
The silicon-induced Pummerer reaction of several amido sulfoxides possessing tethered pi-bonds proceeds by way of a thionium/N-acyliminium ion cascade to provide various azabicyclic ring systems. This cascade sequence was applied toward the synthesis of a member of the protoberberine alkaloid family. (C) 1998 Elsevier Science Ltd. All rights reserved.
The Thionium/N-Acyliminium Ion Cyclization Cascade as a Strategy for the Synthesis of Azapolycyclic Ring Systems
作者:Albert Padwa、Alex G. Waterson
DOI:10.1016/s0040-4020(00)00861-9
日期:2000.12
thiophenyl lactams with BF3·2AcOH which resulted in the generation of an N-acyliminiumion. Cyclization of the iminium ion onto the tethered aromatic ring led to various azapolycyclic ring systems. A related cyclization sequence also occurred with amidosulfoxides that possess simple olefinic tethers. The method was applied toward the synthesis of a member of the protoberberine alkaloid family.