Synthesis of aminomethyl derivatives of 3-methyl-4,7-dihydro-3H-imidazo[4,5-d][1,2,3]triazin-4-one
摘要:
New aminomethyl derivatives of 3-methyl-4,7-dihydro-3H-imidazo[4,5-d][1,2,3]triazin-4-one were synthesized by Mannich reaction. These Mannich bases is also possible to prepare by reaction of 7(5)-hydroxymethyl-3-methyl-4,7(5)dihydro-3H-imidazo[4,5-d][1,2,3]triazin-4-one with amines. The compounds obtained exist in solutions as mixtures of N-5 and N-7 isomers, and the fraction of the latter grows with the polarity of the solvent.
Synthesis of 4-arylcarbamoyl-5-(2-hydroxynaphthylazo)imidazoles and 1-substituted naphtho[2,1-e]imidazo[5,1-c][1,2,4]triazines
作者:E. V. Sadchikova、V. S. Mokrushin
DOI:10.1007/s11172-006-0408-7
日期:2006.7
The reactions of β-naphthol with 5-diazoimidazoles and imidazolyl-5-diazonium salts containing chemically different carboxamide groups in position 4 were studied. Heterocyclization of 4-arylcarbamoyl-5-(2-hydroxynaphthylazo)imidazoles formed in these reactions was investigated. The presence of the NH fragment in the amide group prevents this process, the reaction giving instead 3-substituted 3,7-dihydroimidazo[4