Cyclization of substitued 2-(2-fluorophenylazo) azines to azino [1, 2-c] benzo [d][1, 2, 4] triazinium derivatives

…, E Obijalska, P Kaszynski

Index: Jankowiak, Aleksandra; Obijalska, Emilia; Kaszynski, Piotr Beilstein Journal of Organic Chemistry, 2013 , vol. 9, p. 1873 - 1880

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Citation Number: 2

Abstract

Abstract Light-induced cyclization of several substituted 2-(2-fluorophenylazo) azines in the presence of Ca 2+ ions to the corresponding triazinium derivatives is investigated experimentally and computationally. The azo derivatives of 4-methylpyridine 4 undergo facile cyclization to the corresponding triazinium 1, and the rate of cyclization increases with increasing number of fluorine atoms at the benzene ring. No triazinium ions were obtained ...