Tetrahedron

A novel tandem cyclization of condensed 2, 3-dialkynylpyrazines into [1, 2, 3] triazolo [1′, 5′; 1, 2] pyrido [3, 4-b] pyrazines promoted by sodium azide

…, S Van Dang, AS Tyaglivy, AF Pozharskii, ON Kazheva…

Index: Gulevskaya; Van Dang, Shee; Tyaglivy; Pozharskii; Kazheva; Chekhlov; Dyachenko Tetrahedron, 2010 , vol. 66, # 1 p. 146 - 151

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Citation Number: 16

Abstract

6, 7-Dialkynyl-1, 3-dimethylpteridine-2, 4 (1H, 3H)-diones and 2, 3-dialkynylquinoxalines have been shown to react with sodium azide in DMF at room temperature giving rise 9, 11- dimethyl-[1, 2, 3] triazolo [1′, 5′; 1, 2] pyrido [4, 3-g] pteridine-8, 10 (9H, 11H)-diones and [1, 2, 3] triazolo [1′, 5′; 1, 2] pyrido [3, 4-b] quinoxalines. A novel tandem cyclization involves 1, 3-dipolar cycloaddition of an azide ion to the carbon–carbon triple bond ...