Effect of substituent in pyridine-2-carbaldehydes on their heterocyclization to 1,2,4-triazines and 1,2,4-triazine 4-oxides
作者:A. P. Krinochkin、D. S. Kopchuk、N. V. Chepchugov、I. S. Kovalev、G. V. Zyryanov、V. L. Rusinov、O. N. Chupakhin
DOI:10.1134/s1070428017070016
日期:2017.7
A series of substituted pyridine-2-carbaldehydes were brought into heterocyclization with isonitrosoacetophenone hydrazones, followed by aromatization by the action of oxidants or by dehydration in boiling acetic acid. As a result, substituted 3-(pyridin-2-yl)-1,2,4-triazines or 3-(pyridin-2-yl)-1,2,4-triazine 4-oxides were formed. 6-Formylpyridine-2-carbonitrile failed to undergo heterocyclization