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.
作者:Shengjun Ni、Matic Hribersek、Swarna K. Baddigam、Fredric J. L. Ingner、Andreas Orthaber、Paul J. Gates、Lukasz T. Pilarski
DOI:10.1002/anie.202010202
日期:2021.3.15
The mechanochemical, solvent‐free, highly regioselective, rhodium‐catalyzed C−Hmethylation of (hetero)arenes is reported. The reaction shows excellent functional‐group compatibility and is demonstrated to work for the late‐stage C−Hmethylation of biologically active compounds. The method requires no external heating and benefits from considerably shorter reaction times than previous solution‐based
Pd(ii)-catalyzed oxidative alkoxycarbonylation of 2-phenoxypyridine derivatives with CO and alcohols
作者:Bin Liu、Huai-Zhi Jiang、Bing-Feng Shi
DOI:10.1039/c4ob00084f
日期:——
A Pd(II)-catalyzed oxidative alkoxycarbonylation of phenol derivatives with atmospheric pressure of CO–O2 and alcohols has been achieved. The reaction provides an efficient strategy for the synthesis of carboxylic esters and can be applied to the late-stage modification of complex molecules.
Rhodium-catalyzed <i>ortho</i>-heteroarylation of phenols: directing group-enabled switching of the electronic bias for heteroaromatic coupling partner
作者:Yimin Wu、Wei Li、Linfeng Jiang、Luoqiang Zhang、Jingbo Lan、Jingsong You
DOI:10.1039/c8sc02529k
日期:——
The directedoxidative C–H/C–H cross-coupling reactions between a functionalized arene and a heteroarene typically exhibit an electronic bias for the heteroaromatic coupling partner. Disclosed herein is a conception of directing group enabled-switching of the electronic bias for coupling partner from the electron-deficient to electron-rich heteroarene, demonstrating that the modification of the directing