Visible‐Light Enabled Dehydroxylative Alkylation of α‐Hydroxy Carboxylic Acid Derivatives via C−O Bond Cleavage
作者:Xiaobo Liu、Minming Lu、Xiangli Guo、Huajian Xu、Jun Xu
DOI:10.1002/chem.202302041
日期:2023.10.13
Existing protocols for the boryl radical promoted dehydroxylative alkylation of α-hydroxy carboxylic acid derivatives via C−O bond cleavage require the use of expensive radical initiators and relatively harsh conditions. An improved protocol is presented that uses cheap and readily available sodium tetraphenyl borate (NaBPh4) as a boron radical source. The reaction using the photoredox catalytic system
现有的硼基自由基通过CO键断裂促进α-羟基羧酸衍生物脱羟基烷基化的方案需要使用昂贵的自由基引发剂和相对苛刻的条件。提出了一种改进的方案,该方案使用廉价且容易获得的四苯基硼酸钠(NaBPh 4)作为硼自由基源。使用光氧化还原催化体系的反应可以在温和的条件下进行,并且避免了自由基引发剂(二叔丁氧基二氮烯)的繁琐制备。