Synthesis of 2-(pyridylazo)-2-furyl-and 2-(pyridylazo)-2-thienylmethines and other heterocyclic Schiff bases in the presence of molecular sieves

I Iovel, L Golomba, Y Popelis, S Grinberga…

Index: Iovel'; Golomba; Popelis, Yu.; Popelis; Grinberga; Lukevics Chemistry of Heterocyclic Compounds, 2000 , vol. 36, # 7 p. 779 - 786

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Citation Number: 5

Abstract

Abstract The reactions of 2-furaldehyde, 2-thiophenecarbaldehyde, and their 5-methyl derivatives with 2-aminopyridines and some other amines in the presence of molecular sieves as a dehydrating agent and acid catalyst have been studied. A series of new heterocyclic azomethines was synthesized. Proposals were made for the mechanism of the condensation involving 2-aminopyridines and the structure of the intermediates in these ...