Synthesis of novel fused tricyclic quinolones: 4<i>a</i>,5-Dihydro-1<i>H</i>-[1;2,4]triazino[1,6-<i>a</i>]quinoline-2,4,6(3<i>H</i>)-triones
作者:Dolorès Edmont、Christophe Marot、Jacques Chenault
DOI:10.1002/jhet.5570390608
日期:2002.11
A versatile methodology to build the 1H-[1,2,4]triazino[1,6-a]quinoline-2,4,6(3H)-trione structure from methyl 6-fluoro4-oxo-1,4-dihydro-2-quinolinecarboxylate was developed. The method involves an N-ami-nation followed by condensation of an aroyl isocyanate to form an alpha semicarbazidocarboxylate that readily cyclizes to the fused [1,2,4]triazino ring under ammonia/ethanol condition. Also, the reactivity
一种由甲基6-氟4-氧代-1,4-甲基构建1 H- [1,2,4]三嗪[ 1,6- a ]喹啉-2,4,6(3 H)-三酮结构的通用方法开发了二氢-2-喹啉羧酸酯。该方法涉及N-酰胺化,然后将芳酰基异氰酸酯缩合以形成α半脲基羧酸酯,其在氨/乙醇条件下容易环化成稠合的[1,2,4]三嗪基环。另外,还研究了由此获得的[1,2,4]三嗪基环的反应性。