ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Reductive cyclization of o-nitroazo compounds

M. Potáček and K. Picka

Department of Organic Chemistry, Faculty of Natural Sciences, J. E. Purkyně University, 611 37 Brno

Abstract: It has been confirmed that the intermediates in the reduction of 2,4-dinitroazobenzene with hydrazine to give 6-nitro-2-phenylbenzotriazole are 2,4-dinitrohydrazobenzene and its cyclization product, 6-nitro-2-phenylbenzotriazole-l-oxide. The cyclization reaction follows first-order kinetics with respect to 2,4-dinitrohydrazobenzene. The reaction rate depends on pH, the rate constant being in the range of pH 6.5—9.5 proportional linearly to the concentration of hydroxyl anions.

Full paper in Portable Document Format: 304a568.pdf

Chemical Papers 30 (4) 568–572 (1976)