Regioselective Single-Electron Tsuji–Trost Reaction of Allylic Alcohols: A Photoredox/Nickel Dual Catalytic Approach
作者:Zheng-Jun Wang、Shuai Zheng、Eugénie Romero、Jennifer K. Matsui、Gary A. Molander
DOI:10.1021/acs.orglett.9b02473
日期:2019.8.16
A radical-mediated functionalization of allyl alcohol derived partners with a variety of alkyl 1,4-dihydropyridines via photoredox/nickel dual catalysis is described. This transformation transpires with high linear and E-selectivity, avoiding the requirement of harsh conditions (e.g., strong base, elevated temperature). Additionally, using aryl sulfinate salts as radical precursors, allyl sulfones
描述了自由基介导的烯丙基醇衍生的配偶体通过光氧化还原/镍双重催化与各种烷基1,4-二氢吡啶的官能化作用。这种转变表现出高线性和E选择性,避免了苛刻条件(例如强碱,高温)的要求。另外,使用芳基亚磺酸盐作为自由基前体,也可以获得烯丙基砜。动力学同位素效应实验表明,将镍催化剂氧化添加到烯丙基亲电子试剂中作为营业额限制步骤,为先前的计算研究提供了支持。