Yu. V. Filippova, A. G. Sukhanova, S. Voitekhovich
Jul 1, 2012
Citations
0
Influential Citations
10
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
4-Nitro-1,2,3-triazole was found to react with tert-butanol in concentrated sulfuric acid to yield 1-tert-butyl-4-nitro-1,2,3-triazole as the only reaction product, whereas tert-butylation and tritylation of 4-nitro-1,2,3-triazole in presence of catalytic amount of sulfuric acid in benzene was found to provide mixtures of isomeric 1- and 2-alkyl-4-nitro-1,2,3-triazoles with predominance of N2-alkylated products. A new methodology for preparation of 1-alkyl-5-nitro-1,2,3-triazoles from 1-tert-butyl-4-nitro-1,2,3-triazole via exhaustive alkylation followed by removal of tert-butyl group from intermediate triazolium salts was demonstrated by the example of preparation of 1-methyl-5-nitro-1,2,3-triazole.