Hydrogen-Bond-Catalyzed Arylation of 3-(Aminoalkyl)indoles via C–N Bond Cleavage with Thiourea under Microwave Irradiation: An Approach to 3-(α,α-Diarylmethyl)indoles
of 3-(aminoalkyl)indoles with aryl alcohols and other aromatic nucleophiles through C–N bond cleavage under microwave irradiation to synthesize 3-(α,α-diarylmethyl)indoles. The method uses thiourea as catalyst, which is environmentally benign, water-tolerant and easy to handle. Notably, acid-sensitive substrates are tolerated under the reaction conditions. Thiourea activates the tertiary amine through
An efficient and expedient approach for the synthesis of unsymmetrical 3,3′-Bis-indolylmethanes via silica gel-mediated Friedel-Craftsalkylation of 3-indolylmethanols with diverse indoles is described. The synthetic utility of this transformation was demonstrated by reusing silica gel up to 10 times without apparent loss of reactivity .
A Novel and Efficient Method for the Synthesis of Unsymmetrical Diindolylmethanes and Heterocyclic(indolyl)alkanes
作者:Pulak Bhuyan、Mohit Deb
DOI:10.1055/s-2008-1067217
日期:2008.9
obtained from a three-component reaction of indole, aldehyde, and N,N-dimethylbarbituric acid, undergo an elimination-addition reaction with another indole molecule or heterocyclic nucleophile giving unsymmetrical diindolylmethanes or heterocyclic(indolyl)alkanes in the absence of a catalyst.