Simple, Efficient and Convenient Synthesis of Pyrroles and Pyrazoles Using Zeolites.
作者:R. Sreekumar∗、Raghavakaimal Padmakumar
DOI:10.1080/00397919808006870
日期:1998.5
Abstract A convenient heterogeneous catalytic methodology for the synthesis of Pyrroles and Pyrazoles by an intermolecular reaction of γ or β-diketones with primary amines or hydrazine derivatives over zeolites are described.
Microwave-Assisted Protection of Primary Amines as 2,5-Dimethylpyrroles and Their Orthogonal Deprotection
作者:Amit Walia、Soosung Kang、Richard B Silverman
DOI:10.1021/jo401778e
日期:2013.11.1
Primaryamines can be readily doubly protected as N-substituted 2,5-dimethylpyrroles. Although this protecting group is stable toward strong bases and nucleophiles, long reaction times are required for both the protection and deprotection steps, generally resulting in low deprotection yields. By employing microwave irradiation, protection and deprotection reaction times are dramatically reduced. Furthermore