开发了一种由蓝色 LED 诱导的氨基甲酰自由基、环烯酮和烯丙基锡烷的三组分偶联。使用蓝色LED和二苯基(2,4,6-三甲基苯甲酰基)氧化膦(TPO)作为自由基引发剂使得三组分自由基偶联以高化学选择性进行。对该机制的阐明揭示了从TPO和烯丙基锡烷形成三丁基锡自由基的途径。这种串联自由基反应有望应用于天然产物的合成。
oxidative coupling reaction between formamides and diselenides under metal-free conditions is described. The C–Se bond formation occurred exclusively at the carbonyl carbon by using aqueous tert-butyl hydroperoxide and 4 A molecular sieves and the coupled products, selenocarbamates, were obtained in moderate-to-good yields.
描述了在无金属条件下甲酰胺和二硒化物之间的氧化偶联反应。C-Se 键的形成仅发生在羰基碳上,通过使用水性叔丁基过氧化氢和 4 A 分子筛,并以中等至良好的产率获得了偶联产物硒氨基甲酸酯。
Visible-Light-Induced Three-Component Radical Coupling of Selenocarbamates, Enones, and Allylstannanes with Diphenyl (2,4,6-trimethylbenzoyl)phosphine Oxide
A blue LED-induced three-component coupling of a carbamoyl radical, cyclic enone, and allylstannane was developed. The use of blue LEDs and diphenyl(2,4,6-trimethylbenzoyl)phosphineoxide (TPO) as a radical initiator permitted the three-component radical coupling to proceed with a high chemoselectivity. An elucidation of the mechanism revealed a pathway for the formation of a tributyltin radical from
开发了一种由蓝色 LED 诱导的氨基甲酰自由基、环烯酮和烯丙基锡烷的三组分偶联。使用蓝色LED和二苯基(2,4,6-三甲基苯甲酰基)氧化膦(TPO)作为自由基引发剂使得三组分自由基偶联以高化学选择性进行。对该机制的阐明揭示了从TPO和烯丙基锡烷形成三丁基锡自由基的途径。这种串联自由基反应有望应用于天然产物的合成。