Dehydrogenative Functionalization of C(sp3)-H Bonds Adjacent to a Heteroatom Mediated by Oxoammonium Salts
作者:Heinrich Richter、Olga García Mancheño
DOI:10.1002/ejoc.201000548
日期:——
mediated formation of C-C bonds from benzylicC(sp3 )-H bonds adjacent to an oxygen or nitrogen atom by dehydrogenativecoupling with enolizable carbonyls has been developed. The use of these oxidants in combination with catalytic amounts of Fe(OTf) 2 as Lewis acid allows the reaction to be carried out under mild conditions, leading to the corresponding coupling products in moderate to good yields
通过与可烯醇化羰基的脱氢偶联,由与氧或氮原子相邻的苄基 C(sp 3 )-H 键介导的第一种氧代铵盐介导形成 CC 键。这些氧化剂与作为路易斯酸的催化量的 Fe(OTf) 2 结合使用允许反应在温和的条件下进行,从而以中等至良好的产率产生相应的偶联产物。
Iron‐Catalyzed CC Bond Formation by Direct Functionalization of CH Bonds Adjacent to Heteroatoms
作者:Zhiping Li、Rong Yu、Haijun Li
DOI:10.1002/anie.200802215
日期:2008.9.15
Activation of CH Bonds through Oxidant-Free Photoredox Catalysis: Cross-Coupling Hydrogen-Evolution Transformation of Isochromans and β-Keto Esters
The direct and controlled activation of a C(sp3)Hbond adjacent to an O atom is of particular synthetic value for the conventional derivatization of ethers or alcohols. In general, stoichiometricamounts of an oxidant are required to remove an electron and a hydrogen atom of the ether for subsequent transformations. Herein, we demonstrate that the activation of a CHbond next to an O atom could be