Ligand‐Controlled Regiodivergence in Nickel‐Catalyzed Hydroarylation and Hydroalkenylation of Alkenyl Carboxylic Acids**
作者:Zi‐Qi Li、Yue Fu、Ruohan Deng、Van T. Tran、Yang Gao、Peng Liu、Keary M. Engle
DOI:10.1002/anie.202010840
日期:2020.12.14
the ligand environment around the metal center dictates the regiochemical outcome. Markovnikov hydrofunctionalization products are obtained under mild ligand‐free conditions, with up to 99 % yield and >20:1 selectivity. Alternatively, anti‐Markovnikov products can be accessed with a novel 4,4‐disubstituted Pyrox ligand in excellent yield and >20:1 selectivity. Both electronic and steric effects on the
据报道,镍催化的未活化链烯基羧酸的区域发散性氢芳基化和氢烯基化,从而金属中心周围的配体环境决定了区域化学结果。Markovnikov加氢官能化产物是在无配体的温和条件下获得的,产率高达99%,选择性> 20:1。另外,可以使用新型的4,4-二取代的Pyrox配体获得抗Markovnikov产物,并具有优异的收率和> 20:1的选择性。对配体的电子和空间效应都有助于高产率和选择性。机理研究表明,最佳配体引起的营业额限制和选择性决定步骤发生了变化。DFT计算表明,在反马尔科夫尼科夫途径中,