Expeditious formation of 1,2,4-triazine derivatives via a thiosomünchnone cycloaddition reaction
作者:María J. Arévalo、Martín Avalos、Reyes Babiano、Pedro Cintas、Michael B. Hursthouse、JoséL. Jiménez、Mark E. Light、Ignacio López、Juan C. Palacios
DOI:10.1016/s0040-4039(99)01837-7
日期:1999.12
A novel type of heterocyclization reaction involving the [3+2] cycloaddition of N,N-dialkylamino-substituted thioisomünchnones with azodicarboxylates gives rise to 1,2,4-triazine derivatives after a selective fragmentation pathway of the transient cycloadducts. The X-ray analysis of 7 accounts for the fate of this particular transformation. An asymmetric version using chiral carbohydrate-based thioisomünchnones
涉及N,N-二烷基氨基取代的硫代异氰酸酯与偶氮二羧酸酯的[3 + 2]环加成反应的新型杂环化反应,会在瞬态环加合物的选择性裂解途径后产生1,2,4-三嗪衍生物。X射线分析的7个因素说明了这种特殊转变的命运。还已经公开了使用基于手性碳水化合物的硫代异氰酸酯的不对称形式。