[1,2]-Aryl migration in the synthesis of substituted indoles: scope, mechanism, and high throughput experimentation
作者:Tao Pei、David M. Tellers、Eric C. Streckfuss、Cheng-yi Chen、Ian W. Davies
DOI:10.1016/j.tet.2008.11.026
日期:2009.4
A mild regioselective synthesis of substitutedindoles from readily accessible 1-(2-aminophenyl)-2-chloroethanones is described. Addition of a range of carbon nucleophiles to α-chloro acetophenones 1 generates 2-substituted indoles 2 in moderate to excellent yields. A reaction mechanism involving a [1,2]-arylmigration is proposed. This useful transformation is further examined using high throughput
A general and efficient Pd/sulfoxide-phosphine complex-catalyzed direct asymmetric N-allylic alkylation of indoles has been developed to allow for the preparation of various N-allylated indoles in generally good yields with excellent enantioselectivities. This catalytic system could also be extended to other N-containing heterocycles with good results.
Expanding the [1,2]-Aryl Migration to the Synthesis of Substituted Indoles
作者:Tao Pei、Cheng-yi Chen、Peter G. Dormer、Ian W. Davies