Photocatalytic carbanion generation from C–H bonds – reductant free Barbier/Grignard-type reactions
作者:Anna Lucia Berger、Karsten Donabauer、Burkhard König
DOI:10.1039/c9sc04987h
日期:——
generation of carbanions from benzylic C–H bonds in a photocatalytic Grignard-type reaction. The combination of photo- and hydrogen atom transfer (HAT) catalysis enables the abstraction of a benzylic hydrogen atom, generating a radical intermediate. This radical is reduced in situ by the organic photocatalyst to a carbanion, which is able to react with electrophiles such as aldehydes or ketones, yielding homobenzylic
我们报道了在光催化格利雅型反应中从苄基CH键生成碳负离子的氧化还原中性方法。光和氢原子转移(HAT)催化的结合使抽象的氢苄基原子,产生自由基中间体。该自由基被有机光催化剂原位还原成碳负离子,该碳负离子能够与亲电子试剂(如醛或酮)反应,生成均苄基仲和叔醇。