Iminophosphorane-mediated synthesis of fused [1,2,4]triazines: preparation of [1,2,4]triazolo[5,1-c][1,2,4]triazine and [1,2,4]triazino[4,3-b][1,2,4,5]tetrazine derivatives
作者:Pedro Molina、Mateo Alajarín、Angel Vidal
DOI:10.1039/p19890000247
日期:——
number of [1,2,4]triazolo[5,1-c][1,2,4]triazine and [1,2,4]triazino[4,3-b][1,2,4,5]tetrazine derivatives have been prepared. 3-(2-Benzylidene-1-methylhydrazino)-6-methyl-5-oxo-4-triphenylphosphoranylideneamino-4,5-dihydro-1,2,4-triazine (3), available from the Iminophosphorane (2) and benzaldehyde, reacts with aliphatic isocyanates at room temperature to give the corresponding 8H[1,2,4]triazolo[5,1-c][1
许多[1,2,4] triazolo [5,1- c ] [1,2,4]三嗪和[1,2,4] triazino [4,3- b ] [1,2,4,5已经制备了四嗪衍生物。3-(2-苄叉基-1-甲基肼基)-6-甲基-5-氧代-4-三苯基正膦亚基氨基-4,5-二氢-1,2,4-三嗪(3),可从亚氨基正膦(2)和苯甲醛获得,在室温下与脂族异氰酸酯反应,得到相应的8 H [1,2,4]三唑并[5,1- c ] [1,2,4]三嗪酮(6)–(12)。另一方面,亚氨基磷烷(2)在室温下与酰氯反应生成3-(2-酰基-1-甲基肼基)-6-甲基-5-氧代-4-三苯基磷酰亚氨基氨基-4,5-二氢-1,2,4-三嗪(13) -(15),在室温下与异氰酸酯反应,得到2 H- [1,2,4]三嗪[4,3- b ] [1,2,4,5]四嗪(17)-(24)。