Indium(III) Bromide Catalyzed Rapid Propargylation of Heteroaromatic Systems by α-Aryl-Substituted Propargyl Alcohols
作者:J. Yadav、B. Reddy、K. Rao、G. Kumar
DOI:10.1055/s-2007-990797
日期:2007.10
pyrrole, and furan underwent smooth coupling with propargylic alcohols in the presence of 10 mol% of indium(III) bromide under mild conditions to furnish exclusively propargylated heterocycles in excellent yields and high regioselectivity. The use of indium(III) bromide makes this procedure simple, convenient, and practical. The hydroxygroups of the propargylic alcohols were simply replaced by the nucleophiles
DDQ-mediated oxidative cross-coupling between propargylic sp3 and indoles sp2 carbons
作者:G.L.V. Damu、J. Jon Paul Selvam、C. Venkata Rao、Y. Venkateswarlu
DOI:10.1016/j.tetlet.2009.08.075
日期:2009.11
DDQ-catalyzed oxidative cross-coupling reaction between indoles and propargyl compounds is reported for the first time. The reaction involves direct carbon-carbon bond formation between sp(2) carbons of indoles and sp(3) carbons of propargylates to yield the corresponding propargyl indoles in good yields with high selectivity. (C) 2009 Elsevier Ltd. All rights reserved.