Transition‐Metal‐Free α Csp
<sup>3</sup>
−H Cyanation of Sulfonamides
作者:Liejin Zhou、Siqi Wei、Ziran Lei、Gangguo Zhu、Zuxiao Zhang
DOI:10.1002/chem.202100902
日期:2021.4.26
site‐selective α‐functionalization of sulfonylamide derivatives through the in‐situ generation of imine intermediates. The N−F sulfonylamides, which could facilitate the elimination to generate imines, are coupled with TBACN to efficiently and mildly afford α‐amino cyanides. Comparing with Strecker reaction, this transformation offers a complementary strategy to efficiently construct α‐amino cyanides
该报告描述了通过亚胺中间体的现场生成对磺酰胺衍生物进行的位点选择性α-官能化。可以促进消除反应生成亚胺的Nf磺酰胺与TBACN偶联,可有效,温和地提供α-氨基氰化物。与Strecker反应相比,这种转化提供了一种补充策略,可以从磺酰胺的直接αC-H官能化有效地构建α-氨基氰化物。该反应的特征还在于广泛的底物范围和无需快速色谱柱的后处理。更重要的是,通过控制离去基团产生亚胺的新的双电子途径使我们获得了出色的α位选择性。