已经实现了以区域选择性方式将苯乙烯与 CO2 和芳基卤化物进行可见光驱动的还原碳芳基化的第一个例子。广泛的芳基碘化物和溴化物与该反应相容。此外,吡啶基卤化物、烷基卤化物甚至芳基氯化物也适用于该方法。这些发现可能会激发对新型可见光驱动的 Meerwein 芳基化加成反应的探索,该反应以用户友好的芳基卤作为自由基来源和 CO2 的光催化利用。
Rhodium-Catalyzed Cross-Coupling Reaction of Arylboronates and Diazoesters and Tandem Alkylation Reaction for the Synthesis of Quaternary α,α-Heterodiaryl Carboxylic Esters
作者:Yuk-Tai Tsoi、Zhongyuan Zhou、Wing-Yiu Yu
DOI:10.1021/ol2022577
日期:2011.10.7
A rhodium-catalyzed one-pot three-component coupling reaction was developed for the synthesis of quaternary alpha,alpha-heterodiaryl carboxylic esters. This reaction involves cross-coupling of the arylrhodium(I) complexes with alpha-aryldiazoacetates to form oxa-pi-allylrhodium complexes. With KOfBu and alkyl halides, tandem alkylation of the allyl complex occurs to form a quaternary stereocenter at the carbenic carbon.