Practical synthesis of indoles and benzofurans in water using a heterogeneous bimetallic catalyst

C Rossy, E Fouquet, FX Felpin

Index: Rossy, Cybille; Fouquet, Eric; Felpin, Francois-Xavier Beilstein Journal of Organic Chemistry, 2013 , vol. 9, p. 1426 - 1431

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Citation Number: 8

Abstract

Abstract This paper describes the preparation of indoles, azaindoles and benzofurans in pure water by using a new heterogeneous Pd–Cu/C catalyst through a cascade Sonogashira alkynylation–cyclization sequence. Details of the optimization studies and the substrate scope are discussed. This procedure allows the preparation of heterocycles with good yields and is tolerant to a wide variety of functional groups.