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
Acyclic diaminocarbenes: simple, versatile ligands for cross-coupling reactions
作者:Bhartesh Dhudshia、Avinash N. Thadani
DOI:10.1039/b516398f
日期:——
Acyclic diaminocarbenes are found to be useful ligands for palladium catalyzed Suzuki–Miyaura, Sonogashira and Heck cross-coupling reactions of aryl/alkenyl bromides and chlorides.