作者:Tiezheng Jia、Mengnan Zhang、Hui Jiang、Carol Y. Wang、Patrick J. Walsh
DOI:10.1021/jacs.5b08117
日期:2015.11.4
A unique palladium-catalyzed arylation of alkyl sulfenate anions is introduced that affords aryl alkyl sulfoxides in high yields. Due to the base sensitivity of the starting sulfoxides, sulfenate anion intermediates, and alkyl aryl sulfoxide products, the use of a mild method to generate alkyl sulfenate anions was crucial to the success of this process. Thus, a fluoride triggered elimination strategy
引入了独特的钯催化的烷基次磺酸根阴离子芳基化反应,以高产率提供芳基烷基亚砜。由于起始亚砜、次磺酸根阴离子中间体和烷基芳基亚砜产物的碱敏感性,使用温和的方法生成烷基次磺酸根阴离子对于该过程的成功至关重要。因此,氟化物触发消除策略与烷基 2-(三甲基甲硅烷基)乙基亚砜一起使用以释放必需的烷基次磺酸根阴离子中间体。在含有庞大单齿膦(SPhos 和 Cy-CarPhos)和芳基溴化物或氯化物的钯催化剂存在下,烷基次磺酸根阴离子很容易被芳基化。此外,热裂解和碱促进烷基亚砜的消除被覆盖。