Tetrahedron Letters

A rapid approach for the copper, amine, and ligand-free Sonogashira coupling of 4-methyl-7-nonafluorobutylsulfonyloxy coumarins under microwave irradiation

MN Joy, YD Bodke, KKA Khader, AM Sajith

Index: Joy, M. Nibin; Bodke, Yadav D.; Abdul Khader; Sajith, Ayyiliyath M. Tetrahedron Letters, 2014 , vol. 55, # 15 p. 2355 - 2361

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Citation Number: 5

Abstract

Abstract A rapid, efficient, and reliable access for the synthesis of an assortment of 4-methyl- 7-alkyl/aryl/heteroaryl alkynyl coumarins has been developed by the copper, amine, and ligand-free Sonogashira cross-coupling reaction of 4-methyl-7-nonafluorobutylsulfonyloxy coumarin with various terminal alkynes under microwave irradiation. In the presence of a suitable catalyst, base, and solvent, the coupling reaction proceeded smoothly to give the ...