Nickel-Catalyzed Cross-Coupling of Aryl 2-Pyridyl Ethers with Organozinc Reagents: Removal of the Directing Group via Cleavage of the Carbon–Oxygen Bonds
作者:Wei-Can Dai、Bo Yang、Shi-He Xu、Zhong-Xia Wang
DOI:10.1021/acs.joc.0c02389
日期:2021.2.5
arylzinc reagents under catalysis of NiCl2(PCy3)2 affords aryl–aryl cross-coupling products via selective cleavage of CAr–OPy bonds. The reaction features a wide substrate range and good compatibility of functional groups. β-H-free alkylzinc reagents are also applicable as the nucleophiles in the transformation, whereas β-H-containing alkylzinc reagents lead to a mixture of cross-coupling and hydrogenation
在NiCl 2(PCy 3)2的催化下,芳基2-吡啶基醚与芳基锌试剂的反应通过C Ar -OPy键的选择性裂解提供芳基-芳基交叉偶联产物。该反应具有广泛的底物范围和官能团的良好相容性。无β-H的烷基锌试剂也可用作转化中的亲核试剂,而含β-H的烷基锌试剂可导致交叉偶联和氢化产物的混合物。
Direct catalytic cross-coupling of organolithium compounds
作者:Massimo Giannerini、Martín Fañanás-Mastral、Ben L. Feringa
DOI:10.1038/nchem.1678
日期:2013.8
carbon–carbon bond formation based on cross-coupling reactions plays a central role in the production of natural products, pharmaceuticals, agrochemicals and organic materials. Coupling reactions of a variety of organometallic reagents and organic halides have changed the face of modern synthetic chemistry. However, the high reactivity and poor selectivity of common organolithium reagents have largely prohibited