The Ligand Free Palladium(II)-Catalyzed Regioselective 1,2-Addition of Enol Silanes to Quinones to Access 4-Hydroxy-4-(2-oxo-2-arylethyl)cyclohexadien-1-ones and Synthetic Applications
作者:Subba Rao Polimera、Murugaiah A. M. Subbaiah、Andivelu Ilangovan
DOI:10.1021/acs.joc.1c00857
日期:2021.11.5
In contrast to the conventional 1,4-addition process, regioselective 1,2-addition of silyl enol ethers to quinones can now be achieved via a palladium(II) enolate pathway that provides access to 4-hydroxy-4-(2-oxo-2-arylethyl)cyclohexa-2,5-dien-1-one derivatives. This quinone alkylation protocol proceeds under mild reaction conditions at ambient temperature under open air and does not require either
与传统的 1,4-加成过程相比,现在可以通过提供 4-羟基-4-(2-氧代) 的钯 (II) 烯醇化物途径实现硅烯醇醚与醌的区域选择性 1,2-加成-2-芳乙基)环六-2,5-二烯-1-酮衍生物。这种醌烷基化方案在温和的反应条件下在环境温度和露天环境下进行,不需要钯的外部配体或使用碱。此外,环己二烯酮产物已被用作构建稠合杂芳基体系的合成前体。