V. L. Korolev

Synthesis and properties of 1,2,4-triazolo[4,3-d]-1,2,4-triazolo-[3,4-f]furazano[3,4-b]pyrazines

New methods for the synthesis of 1,2,4-triazolo[4,3-d]-1,2,4-triazolo[3,4-f]furazano[3,4-b]pyrazines with functional substituents of various types are proposed and some properties of these compounds are studied.

Synthesis and some properties ofN-polynitromethyl derivatives of fused benzotriazoles

The procedures for the synthesis ofN-polynitromethyl derivatives of benzo[1,2-d;4,5d′]ditriazole-4,8-dione are described. Some chemical properties of the compounds obtained are investigated.

The synthesis of fused benzotriazoles based on hexaaminobenzene derivatives

New methods for synthesis of hexaaminobenzene are proposed and, based on this compound, previously unknown preparative procedures for obtaining fused benzotriazoles are developed.

Interaction of 4-aminobenzofurazan with aryldiazonium salts

The reaction of 4-aminobenzofurazan with aryldiazonium salts leads to the formation of 4-amino-5-aryl-azobenzofurazans and 5-amino-2-aryl-4-nitroso-2H-benzotriazoles, products of the rearrangement of the initially formed 4-amino-7-(arylazo)benzofurazans. Oxidation of the benzofurazan as well as of the triazole derivatives gives 7-aryl-1,2,3-triazol[4,5-e]benzofurazans. The chemical properties of some of the compounds obtained have been investigated.

Synthesis of benzotristriazole. 4-nitrobenzo[1,2-d:3,4-d′] bistriazole and 4,4′-dicarboxy-5,5′-1H-1,2,3-triazole

The treatment of 2,5,8-tri(2,4-dinitrophenyl)benzotristriazole, 2,7-di(2,4-dinitrophenyl)-4-nitrobenzo[1,2-d∶3,4-d′]bistriazole, and 4,4′-dicarboxy-5,5′-bis[2- (2,4-dinitrophenyl)-2H-1,2,3-triazole with sodium methylate leads to loss of the 2,4-dinitrophenyl group as 2,4-dinitroanisole and formation of benzotristriazole, 4-nitrobenzo[1,2-d∶3,4-d′]bistriazole, and 4,4′-dicarboxy-5,5′-bis-1H-1,2,3-triazole, respectively, in good yields.