Synthesis and microwave-assisted catalytic activity of novel bis-benzimidazole salts bearing furfuryl and thenyl moieties in Heck and Suzuki cross-coupling reactions

Abstract

A mixture of bis-benzimidazole salts (1-7), Pd(OAc)(2) and K(2)CO(3) in DMF-H(2)O catalyzes, in high yield, the Suzuki and Heck cross-coupling reactions assisted by microwave irradiation in a short time. In particular, the yields of the Heck and Suzuki reactions with aryl bromides were found to be nearly quantative. The synthesized bis-benzimidazole salts (1-7) were identified by (1)H-(13)C NMR, IR spectroscopic methods and micro analysis. Copyright (C) 2010 John Wiley & Sons, Ltd.