One-Pot Silver-Catalyzed and PIDA-Mediated Sequential Reactions: Synthesis of Polysubstituted Pyrroles Directly from Alkynoates and Amines
作者:Weibing Liu、Huanfeng Jiang、Liangbin Huang
DOI:10.1021/ol9026478
日期:2010.1.15
The addition/oxidative cyclization of alkynes with amines in the presence of AgBF4 catalyst and PIDA oxidant leads to polysubstituted pyrroles. The reaction corresponds to the construction of a pyrrole fragment, which also provides a new way to the formation of C-C bonds.
Conventional and Microwave-Assisted Facile One-Pot Synthesis of N-Substituted Pyrrole-2,3,4,5-tetracarboxylates Under Neat Conditions
作者:H. Valizadeh、M. M. Heravi、M. Amiri
DOI:10.1080/00397910903531680
日期:2010.11.16
Highly substituted pyrroles 3a,f were prepared conveniently in a reaction of (dimethyl- and diethyl-)acethylenedicarboxylates 1a-b with N-(methyl- and aryl-) hydroxylamines 2a-d in the presence of NaHCO3 using both conventional heating and microwave irradiation. Excelent yields of the very pure products were isolated under solvent-free conditions both at classical as well as microwave heating.
VERNON, J. M.;CARR, R. M.;SUKARI, M. A., J. CHEM. RES. MICROFICHE, 1982, N 5, 115