Ligand-Controlled Chemoselective C(acyl)–O Bond vs C(aryl)–C Bond Activation of Aromatic Esters in Nickel Catalyzed C(sp<sup>2</sup>)–C(sp<sup>3</sup>) Cross-Couplings
作者:Adisak Chatupheeraphat、Hsuan-Hung Liao、Watchara Srimontree、Lin Guo、Yury Minenkov、Albert Poater、Luigi Cavallo、Magnus Rueping
DOI:10.1021/jacs.7b12865
日期:2018.3.14
converted into the alkylated arenes and ketone products, respectively. The utility of this newly developed protocol was demonstrated by its wide substrate scope, broad functional group tolerance and application in the synthesis of key intermediates for the synthesis of bioactive compounds. DFT studies on the oxidative addition step helped rationalizing this intriguing reaction chemoselectivity: whereas
开发了一种配体控制和位点选择性镍催化的 Suzuki-Miyaura 交叉偶联反应,以芳香酯和烷基有机硼试剂作为偶联伙伴。该方法通过成功抑制不需要的 β-氢化物消除过程,以直接的方式为 C(sp2)-C(sp3) 键的形成提供了一条简便的途径。通过简单地切换磷配体,酯底物分别转化为烷基化芳烃和酮产物。这种新开发的协议的实用性体现在其广泛的底物范围、广泛的官能团耐受性和在合成生物活性化合物的关键中间体的合成中的应用。对氧化加成步骤的 DFT 研究有助于合理化这种有趣的反应化学选择性: