A modular synthesis of polyfunctional dipyrrolemethanes is presented. Diverse side chains are introduced to 2-carboxypyrrole building blocks in two to four steps, resulting in a collection of substituted pyrroles that, when condensed in one step, give rise to diverse structural features.
Synthesis of Pyrroles by Click Reaction: Silver-Catalyzed Cycloaddition of Terminal Alkynes with Isocyanides
作者:Meng Gao、Chuan He、Hongyi Chen、Ruopeng Bai、Ben Cheng、Aiwen Lei
DOI:10.1002/anie.201302604
日期:2013.7.1
Just click with silver: Pyrroles are prepared by the co‐cyclization of terminal alkynes and isocyanides in a silver‐catalyzed click reaction. This route represents an extremely simple, efficient, and atom‐economic approach to substituted pyrroles in good yields with high selectivity, thus complementing the click method for the rapid formation of multifunctional heterocycles.
作者:Michael Schramm、Cindy Pham、Michelle Park、Jenny Pham、Sadie Martin
DOI:10.1055/s-0032-1318503
日期:——
A modular synthesis of polyfunctional dipyrrolemethanes is presented. Diverse side chains are introduced to 2-carboxypyrrole building blocks in two to four steps, resulting in a collection of substituted pyrroles that, when condensed in one step, give rise to diverse structural features.
Intermolecular Dearomatization Reaction of Pyrroles Promoted by Silica Gel
作者:Yong Zhou、Chun-Xiang Zhuo、Qing Gu、Shu-Li You
DOI:10.1002/adsc.201401150
日期:2015.3.23
An efficient synthesis of polysubstituted 2H‐pyrrole derivatives via a silica gel‐promoted intermolecular dearomative Michaeladdition of pyrroles with α,β‐unsaturated ketones has been developed. This transformation features environmentally benign promoter, high efficiency, wide substrate scope and mild reaction conditions.