Photochemical Regioselective C(sp<sup>3</sup>)–H Amination of Amides Using <i>N</i>-Haloimides
作者:Lei Pan、Joseph Elmasry、Tomas Osccorima、Maria Victoria Cooke、Sébastien Laulhé
DOI:10.1021/acs.orglett.1c00831
日期:2021.5.7
A metal-free regioselective C(sp3)–H amination of amides using N-haloimides in the presence of lithium tert-butoxide and visible light is presented herein. This photoexcited approach is straightforward, and it aminates a wide variety of amides under mild conditions without the use of photocatalysts, external radical initiators, or oxidants. A halogen-bonded intermediate between the tert-butoxide base
本文介绍了在叔丁醇锂和可见光存在下使用N-卤代酰亚胺对酰胺进行无金属区域选择性 C(sp 3 )–H 胺化反应。这种光激发方法很简单,它可以在温和条件下胺化多种酰胺,而无需使用光催化剂、外部自由基引发剂或氧化剂。叔丁醇碱和N-卤代酰亚胺之间的卤素键合中间体被认为是提高光反应性的原因。计算表明,这种电子供体-受体复合物的形成呈现出能量分布。