Iminophosphorane-mediated synthesis of fused [1,2,4]triazines: preparation of the novel [1,2,4]triazino[4,3-b][1,2,4,5]tetrazine ring system
作者:Pedro Molina、Mateo Alajarin、Angel Vidal、J. Elguero、R.M. Claramunt
DOI:10.1016/s0040-4020(01)81733-6
日期:1988.1
ranyli-deneamino-4,5-dihydro[1,2,4]triazine 3 reacts with acyl chlorides to give the corresponding 3-substituted-l,4-dihydro-1,7-dimethyl-6-oxo-4H-[1,2,4]triazino[4,3-b][1,2,4,5]tetrazines 5. On the other hand, the N-aminoheterocycle 4-amino-6-methyl-3-(l-methylhydrazino)-5-oxo-4,5-dihydro[1,2,4]triazine 2 reacts with carbonyl compounds to give 1,2,3,4-tetrahydro[1,2,4]triazino[4,3-b][1,2,4,5]tetrazines
6-甲基-3-(1-甲基肼基)-5-氧代-4-三苯基磷酰苯二胺-二烯氨基-4,5-二氢[1,2,4]三嗪3与酰氯反应生成相应的3-取代-1, 4-二氢-1,7-二甲基-6-氧代-4H- [1,2,4]三嗪[4,3-b] [1,2,4,5]四嗪5。另一方面,N -氨基杂环4-氨基-6-甲基-3-(1-甲基肼基)-5-氧代-4,5-二氢[1,2,4]三嗪2与羰基化合物反应生成1,2,3,4-四氢[1,2,4]三嗪[4,3-b] [1,2,4,5]四嗪6,它们在DDQ作用下脱氢,得到5。