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

Full Text: HTML

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.

Related Articles:

Bienzymatic synthesis of benzothia/(oxa) zoles in aqueous medium

[Kumar, Atul; Sharma, Siddharth; Maurya, Ram Awatar Tetrahedron Letters, 2010 , vol. 51, # 48 p. 6224 - 6226]

Direct arylation of oxazole and benzoxazole with aryl or heteroaryl halides using a palladium–diphosphine catalyst

[Derridj, Fazia; Djebbar, Safia; Benali-Baitich, Ouassini; Doucet, Henri Journal of Organometallic Chemistry, 2008 , vol. 693, # 1 p. 135 - 144]

Sequential one-pot synthesis of benzoxazoles from aryl bromides: successive palladium-and copper-catalyzed reactions

[Wu, Xiao-Feng; Neumann, Helfried; Neumann, Stephan; Beller, Matthias Tetrahedron Letters, 2013 , vol. 54, # 24 p. 3040 - 3042]

Efficient One??Step Synthesis of Benzazoles in Aqueous Media

[Boeini, Hassan Zali; Najafabadi, Khadijeh Hajibabaei European Journal of Organic Chemistry, 2009 , # 29 p. 4926 - 4929]

Sequential one-pot synthesis of benzoxazoles from aryl bromides: successive palladium-and copper-catalyzed reactions

[Wu, Xiao-Feng; Neumann, Helfried; Neumann, Stephan; Beller, Matthias Tetrahedron Letters, 2013 , vol. 54, # 24 p. 3040 - 3042]

More Articles...