Tetrahedron Letters

A novel ionic liquid mediated synthesis of 4 (1H)-quinolones, 5H-thiazolo [3, 2-a] pyrimidin-5-one and 4H-pyrimido [2, 1-b] benzothiazol-4-ones

AK Yadav, GR Sharma, P Dhakad, T Yadav

Index: Yadav, Ashok K.; Sharma, Gopi Ram; Dhakad, Pankaj; Yadav, Tripti Tetrahedron Letters, 2012 , vol. 53, # 7 p. 859 - 862

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Citation Number: 10

Abstract

A new, convenient, environmentally benign two-step synthesis of 4 (1H)-quinolones, 5H- thiazolo [3, 2-a] pyrimidin-5-one and 4H-pyrimido [2, 1-b] benzothiazol-4-ones have been developed by first condensing substituted arylamine/2-aminothiazole/2- aminobenzenethiazole with Meldrum's acid and trimethylorthoformate in 1-butyl-3- methylimidazolium bromide at a moderate temperature to afford 5-{(substituted aryl/4- ...