作者:Thomas A. Alanine、Stephen Stokes、Craig A. Roberts、James. S. Scott
DOI:10.1039/c7ob02486j
日期:——
A palladium mediated C–H aziridination reaction of 3,3,5,5-substituted-piperazin-2-ones has been developed using phenyliodonium diacetate (PIDA) and succinic acid to give synthetically useful bicyclic aziridines, in moderate to good yields. Succinic acid was found to be key for selectively promoting C–N bond formation (aziridination) and suppressing competitive acetoxylation. Analysis of the reaction
使用二乙酸苯基碘鎓(PIDA)和琥珀酸已开发了由3,3,5,5-取代的哌嗪-2-酮进行的钯介导的CHH叠氮化反应,以中等至良好的产率提供了合成上有用的双环氮丙啶。发现琥珀酸是选择性促进C–N键形成(叠氮)和抑制竞争性乙酰氧基化的关键。反应动力学分析表明,在反应速率确定步骤中,琥珀酸在促进单体钯与二聚钯物种之间的平衡中发挥了作用。氮丙啶可以在Lewis或Brønsted酸性条件下被亲核试剂开环,得到正规的CH功能官能化产物。可以进一步控制反应条件以产生乙酰氧基化,