Synthesis of pyrrolidines and pyrrolidinones by the rhodium complex catalyzed cyclization of unsaturated amines
作者:Jian Qiang Zhou、Howard Alper
DOI:10.1021/jo00038a019
日期:1992.6
N-Allylic arylamines react with carbon monoxide, sodium borohydride, 2-propanol, and catalytic amounts of the zwitterionic complex eta-6-C6H6BPh3-Rh(COD)+ (1), to form pyrrolidines as the main products in most cases. Pyrrolidinones result from N-allylic alkylamines. An alternate route to the lactams from N-allylic alkylamines involves synthesis gas instead of CO/NaBH4, together with the dual catalytic system 1/[Ru(CO)3Cl2]2. Complementary to the N-allylic arylamine route to pyrrolidines with NaBH4 and 1 is the use of synthesis gas, 1, and 1,4-bis(diphenylphosphino)butane.