A mild and efficient method for the preparation of N-tosyl amides and lactams
D Tanner, P Somfai
Index: Tanner, David; Somfai, Peter Tetrahedron, 1988 , vol. 44, # 2 p. 613 - 618
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Citation Number: 64
Abstract
N-tosyl amides and lactams can be prepared easily and under mild conditions by the inter-or intramolecular condensation of carboxylic acids and secondary sulfonamides. The coupling reagent used is dicyclohexyl-carbodiimide (DCC) in the presence of 4-pyrrolidinopyridine (4- PPY) and the reactions proceed readily, usually in high yield, at room temperature.
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