Rh(I)-Catalyzed Arylation of Heterocycles via C−H Bond Activation: Expanded Scope through Mechanistic Insight
作者:Jared C. Lewis、Ashley M. Berman、Robert G. Bergman、Jonathan A. Ellman
DOI:10.1021/ja0748985
日期:2008.2.1
A practical, functional group tolerant method for the Rh-catalyzed direct arylation of a variety of pharmaceutically important azoles with aryl bromides is described. Many of the successful azole and aryl bromide coupling partners are not compatible with methods for the direct arylation of heterocycles using Pd(0) or Cu(I) catalysts. The readily prepared, low molecular weight ligand, Z-1-tert-butyl-2
Imidazole synthesis by transition metal free, base-mediated deaminative coupling of benzylamines and nitriles
作者:Uttam Kumar Das、Linda J. W. Shimon、David Milstein
DOI:10.1039/c7cc08322j
日期:——
A transition metal free, straightforward synthetic method for the preparation of substituted imidazoles is reported herein. Base promoted, deaminative coupling of benzylamines with nitriles results in the one-step synthesis of 2,4,5-trisubstituted imidazoles with liberation of ammonia. This protocol provides a practical strategy for the synthesis of valuable imidazole derivatives from readily available