An Alternative to the Classical α-Arylation: The Transfer of an Intact 2-Iodoaryl from ArI(O<sub>2</sub>CCF<sub>3</sub>)<sub>2</sub>
作者:Zhiyu Jia、Erik Gálvez、Rosa María Sebastián、Roser Pleixats、Ángel Álvarez-Larena、Eddy Martin、Adelina Vallribera、Alexandr Shafir
DOI:10.1002/anie.201405982
日期:2014.10.13
The α‐arylation of carbonyl compounds is generally accomplished under basic conditions, both under metal catalysis and via aryl transfer from the diaryl λ3‐iodanes. Here, we describe an alternative metal‐free α‐arylation using ArI(O2CCF3)2 as the source of a 2‐iodoaryl group. The reaction is applicable to activated ketones, such as α‐cyanoketones, and works with substituted aryliodanes. This formal
羰基化合物的α芳基化在碱性条件下完成通常,两个下金属催化和经由从碳酸二芳基芳基转移λ 3个-iodanes。在这里,我们描述了使用ArI(O 2 CCF 3)2作为2-碘芳基的来源的另一种无金属的α-芳基化作用。该反应适用于活化的酮,例如α-氰基酮,并可以与取代的芳基丙二酮一起使用。据认为,这种正式的CH官能化反应是通过[3,3]烯醇碘鎓的重排进行的。最终的α-(2-碘代芳基)酮是通用的合成构件。