β,β-Disubstituted <i>C</i>- and <i>N</i>-Vinylindoles from One-Step Condensations of Aldehydes and Indole Derivatives
作者:Gil Fridkin、Nicolas Boutard、William D. Lubell
DOI:10.1021/jo900526p
日期:2009.8.7
Direct preparation of β,β-disubstituted C- and N-vinylindoles from condensation of aldehydes on indole derivatives is presented. Heating 1-methyl- and 1-benzylindole 3a,b with alkyl and aryl α-branched aldehydes and TFA in acetonitrile using microwave irradiation furnished 3-vinylindoles 1a−e in 18−76% yields. Under similar conditions, 3-substitutedindoles 4a−c provided N-vinylindoles 2a−h in 16−98%
Cobalt-catalysed reductive C–H alkylation of indoles using carboxylic acids and molecular hydrogen
作者:Jose R. Cabrero-Antonino、Rosa Adam、Kathrin Junge、Matthias Beller
DOI:10.1039/c7sc02117h
日期:——
further demonstrated through the C3 alkylation of several substituted indole derivatives using acetic, phenylacetic or diphenylacetic acids. In addition, a careful selection of the reaction conditions allowed to perform the selective C3 alkenylation of some indole derivatives. Moreover, the alkenylation of C2 position of 3-methyl-1H-indole was also possible. Control experiments indicate that the aldehyde