Nickel-catalyzed C–O bond reduction of aryl and benzyl 2-pyridyl ethers
作者:Jing Li、Zhong-Xia Wang
DOI:10.1039/c7cc09668b
日期:——
The reduction of aryl and benzyl 2-pyridyl ethers with sodium isopropoxide was carried out via nickel-catalyzed C–OPy bond cleavage, giving reductive products in reasonable to excellent yields. This method allowed the 2-pyridyloxy group to be directly removed with high efficiency, mild reaction conditions, and good compatibility of functional groups.
Rh<sup>III</sup>-Catalyzed Olefination of 2-Aryloxypyridines Using 2-Pyridyloxyl as the Removable Directing Group
作者:Arun Jyoti Borah、Guobing Yan、Lianggui Wang
DOI:10.1002/ejoc.201500530
日期:2015.7
An efficient RhIII-catalyzed trans selective ortho-olefination of 2-aryloxypyridines has been developed. The catalytic system is very effective for olefination of differently substituted 2-aryloxypyridines with acrylates, acrylamide and styrenes and exhibits broad compatibility with assorted olefinic coupling partners. Although acrylates and acrylamide give rise to trans-olefinated products in MeOH
Catalytic Reductive Cross‐Coupling between Aromatic Aldehydes and Arylnitriles
作者:Atsuhisa Mitsui、Kazunori Nagao、Hirohisa Ohmiya
DOI:10.1002/chem.202100763
日期:2021.4.26
A reductive cross‐coupling reaction between aromatic aldehydes and arylnitriles using a copper catalyst and a silylboronate as a reductant is reported. This protocol represents an unprecedented approach to the chemoselective synthesis of α‐hydroxy ketones by electrophile–electrophile cross‐coupling.
Nickel-Catalyzed Transformation of Aryl 2-Pyridyl Ethers via Cleavage of the Carbon–Oxygen Bond: Synthesis of Mono-α-arylated Ketones
作者:Zhong-Xia Wang、Jing Li
DOI:10.1055/s-0037-1609963
日期:2018.8
aryl 2-pyridyl ethers with propiophenone and acetophenone derivatives via C–OPy bond cleavage is performed in the presence of t-BuOLi to give mono-α-arylated ketones in moderate yields. The method is suitable for electron-rich and electron-poor ethers as well as heteroaryl ethers and tolerates a range of active functional groups. The nickel/IPr-catalyzed reaction of aryl 2-pyridyl ethers with propiophenone
Identification of an Oxalamide Ligand for Copper‐Catalyzed C−O Couplings from a Pharmaceutical Compound Library
作者:Vincent S. Chan、Scott W. Krabbe、Changfeng Li、Lijie Sun、Yue Liu、Alex J. Nett
DOI:10.1002/cctc.201900393
日期:2019.12.5
stocked with molecular diversity and could provide a platform for the discovery of newligand structures. Herein, we describe the use of this approach in combination with highthroughput screening to identify N,N’‐bis(thiophene‐2‐ylmethyl)oxalamide as a ligand that is generally effective for copper‐catalyzed C−O cross‐couplings to prepare both biarylethers as well as phenols under mild conditions.