75953-44-5

Upstream product

• 106-47-8 4-chloro-aniline 
• 108-45-2 m-phenylenediamine 
• 18371-09-0 4-(4-chloro-phenylazo)-m-phenylenediamine 
• 541-41-3 chloroformic acid ethyl ester 

Downstream Products

• 75953-52-5 6-Amino-2-(4-chloro-phenyl)-2H-benzo[1,2,4]triazin-3-one 

Relevant academic research and scientific papers

SYNTHESIS OF SOME 2-ARYL-6-AMINO-2,3-DIHYDRO-1,2,4-BENZOTRIAZIN-3-ONES

Acylation of 2,4-diaminoazobenzene and its derivatives Ia-Ih with ethyl chloroformate gives high yields of the corresponding 2,4-bis(ethoxycarbonylamino)azobenzenes IIa-IIh which, on boiling in acid medium, are cyclized with simultaneous splitting off the second ethoxycarbonyl group to give the mesomeric 6-amino-2-aryl-3-oxo-2,3-dihydro-1,2,4-benzotriazinium cations IIIa-IIIh; the latter have been transformed into free bases IVa-IVh or their tautomers Va-Vh.Constitution of the prepared compounds has been studied by IR spectroscopy.Influence of medium on valence vibrations of the carbamate NH groups in the compounds II has also been studied.