Tetrahedron Letters

Pd (OAc) 2 catalyzed synthesis of 2-aryl-and 2-heteroaryl-benzoxazoles and benzothiazoles in imidazolium ionic liquids (ILs) without additives and with recycling/ …

RG Kalkhambkar, KK Laali

Index: Kalkhambkar, Rajesh G.; Laali, Kenneth K. Tetrahedron Letters, 2012 , vol. 53, # 32 p. 4212 - 4215

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Citation Number: 21

Abstract

A facile, high yielding, method for the synthesis of a library of 2-aryl-and 2-heteroaryl- benzoxazoles and benzothiazoles from readily available Schiff bases is reported employing catalytic amounts of Pd (OAc) 2 in imidazolium ionic liquids (bmim) BF4 and (bmim) PF6 without ligands and/or additives. Simple product isolation and recycling/re-use of the IL are additional advantages of this method.

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