92000-82-3Relevant academic research and scientific papers
Triazines and Related Products. Part 28. Conversion of 3-Aryl-1-(2-cyanophenyl)triazenes into 3-Arylquinazolin-4(3H)-ones with Formamide
Baig, Ghouse Unissa,Stevens, Malcolm F. G.
, p. 2765 - 2766 (2007/10/02)
The thermolysis of 4-anilino-1,2,3-benzotriazines and their precursor 3-aryl-1-(2-cyanophenyl)triazenes in hot formamide to give 3-arylquinazolin-4(3H)-ones in high yield is described.The reaction cannot be extended to the preparation of 2-alkyl-3-arylquinazolinones.In hot acetamide-diglyme 4-(4-nitroanilino)-1,2,3-benzotriazine (5c) gives a high yield of the 3-substituted 4-(4-nitrophenylimino)-3,4-dihydro-1,2,3-benzotriazine (11c).
