Condensed 1,2,4-Triazines: Synthetic and Molecular Modeling Studies of 5,8-Dihydro-7-methylpyrazino[2,3-e]-1,2,4-triazines
作者:Cherng-Chyi Tzeng、Kuan-Han Lee、Yeh-Long Chen、Tai-Chi Wang
DOI:10.3987/com-96-7387
日期:——
5,8-Dihydro-7-methylpyrazino[2,3-e]-1,2,4-triazines (dihydroazapteridines) were prepared by Hinsberg reaction of 5,6-diamino-1,2,4-triazines with bromoacetone via a regiospecific fashion. The initial Z-form Schiff base intermediates cyclized to give 5,6-dihydro-7-methylpyrazino[2,3-e]-1,2,4-triazines which underwent pi redistribution to afford 5,8-dihydro-7-methylpyrazino[2,3-e]-1,2,4-triazines as final products.