34985-93-8

Upstream product

• 18674-01-6 2-(3,5-diphenyl-[1,2,4]triazol-1-yl)-1,1,1,3,3,3-hexamethyl-disilazane 
• 888-71-1 3,5-diphenyl-1,2,4-oxadiazole 
• 2039-06-7 3,5-diphenyl-1,2,4-triazole 
• 14478-73-0 3,6-diphenyl-1,4-dihydro-1,2,4,5-tetrazine 

Downstream Products

• 95309-36-7 1-dimethylamino-3,5-diphenyl-1,2,4-triazole 

Relevant academic research and scientific papers

Radical scavenging by N-aminoazaaromatics

N-Aminoazaaromatics were found to react with nitric oxide in the presence of oxygen to afford deaminated products in high yields. The reaction proceeded almost instantaneously in various solvents including water, and one to two equivalent of NO was consumed depending upon the amount of oxygen coexisted, and 1 equivalent of N2O was released in the reaction. In addition, N-aminoazoles were deaminated by potassium superoxide to give parent azoles in good yields. Two equivalents of superoxide was consumed, and about half equivalents of both nitrite and nitrate ion were released. The results demonstrated that N-aminoazoles have ability to protect the biological system against the oxidation promoted by radicals such as nitrogen oxides and superoxide. Copyright (C) 2000 Elsevier Science Ltd.

Photoinduced molecular rearrangements. The photochemistry of some 1,2,4-oxadiazoles in the presence of nitrogen nucleophiles. Formation of 1,2,4-triazoles, indazoles, and benzimidazoles

The photochemistry of some 3,5-disubstituted 1,2,4-oxadiazoles in the presence of nitrogen nucleophiles [external, such as added amines or hydrazines, or internal, such as an o-aminophenyl moiety at C(3) of the oxadiazole ring] has been investigated. In the irradiation of 5-amino-(or 5-N-substituted amino) 3-phenyl-1,2,4-oxadiazoles in the presence of aliphatic primary amines (or ammonia), photolytic species arising from heterolytic cleavage of the ring O-N bond capture the nucleophilic reagent to give open-chain intermediates, which develop into 1,2,4-triazolin-5-ones. Similarly, irradiations of 3,5-diphenyl-, 3-methoxy-5-phenyl-, and 5-methyl-3-phenyl-1,2,4-oxadiazoles gave 1,2,4-triazoles. In the same context, irradiations of representative substrates in the presence of hydrazines have been also investigated. In the irradiation of 3-(o-aminophenyl)-5-methyl-, 3-[o-(methylamino)phenyl]-5-methyl-, and 3-(o-aminophenyl)-5-phenyl-1,2,4-oxadiazoles, concomitant formation of indazoles and benzimidazoles, presumably arising from a common photolytic species, has been observed. Some mechanistic aspects have been considered, and possible applications in synthesis have been pointed out.

Thermal Rearrrangement of 1-Alkyl-3,6-diaryl-1,4-dihydro-s-tetrazines to 1-Alkylamino-3,5-diaryl-1,2,4-triazoles

s-Tetrazines having aryl substituents in either the 3- or 3,6-positions react readily with alkyl or aryl Grignard reagents to give 1-alkyl(or aryl)-1,4-dihydro-s-terazines.The 1-alkyl-1,4-dihydro-s-tetrazines rearrange in methanolic hydrogen chloride to 4-alkylamino-1,2,4-triazoles, but thermolyse readily to the less well known, isomeric 1-alkylamino-1,2,4-triazoles.Possible reaction pathways involving breakdown to nitrile and reactive intermediates such as 1,3-dipolar species are discussed.