Design of an Electron-Withdrawing Benzonitrile Ligand for Ni-Catalyzed Cross-Coupling Involving Tertiary Nucleophiles
作者:L. Reginald Mills、Racquel K. Edjoc、Sophie A. L. Rousseaux
DOI:10.1021/jacs.1c05281
日期:2021.7.14
The design of new ligands for cross-coupling is essential for developing new catalytic reactions that access valuable products such as pharmaceuticals. In this report, we exploit the reactivity of nitrile-containing additives in Ni catalysis to design a benzonitrile-containing ligand for cross-coupling involving tertiary nucleophiles. Kinetic and Hammett studies are used to elucidate the role of the
设计用于交叉偶联的新配体对于开发获得有价值产品(如药物)的新催化反应至关重要。在本报告中,我们利用含腈添加剂在 Ni 催化中的反应性来设计含苄腈的配体,用于涉及三级亲核试剂的交叉偶联。动力学和哈米特研究用于阐明优化配体的作用,这表明苄腈部分充当电子受体,以促进还原消除而不是 β-氢化物消除并稳定低价镍。在这些条件下,进行了脱氰-金属化和镍催化芳基化的方案,从而能够从双取代丙二腈中获得四元 α-芳基腈。