Tetrahedron letters

A synthetic entry to 3, 5-disubstituted pyridines

ML Bennasar, E Zulaica, T Roca, Y Alonso…

Index: Bennasar, M.-Lluisa; Zulaica, Ester; Roca, Tomas; Alonso, Yolanda; Monerris, Manuel Tetrahedron Letters, 2003 , vol. 44, # 25 p. 4711 - 4714

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Citation Number: 12

Abstract

With the final aim of developing a common synthetic entry to 3,5-disubstituted pyridines from readily available β-monosubstituted pyridine starting materials, we decided to take advantage of the nucleophilic character of the unsubstituted enaminic side of 1,4-dihydro derivatives of N-alkyl-3-acylpyridinium salts to introduce an additional acyl substituent at the 5-position. This would represent an extension of our previous work, 6., and in which the intermediate 1,4- ...