Phosphine ligands stabilized Cu(I) catalysts for carbene insertion into the N–H bond
作者:Kankanala Ramakrishna、Chinnappan Sivasankar
DOI:10.1016/j.jorganchem.2016.01.016
日期:2016.3
these ligands were less explored relatively for carbene involved reactions owing to the formation of carbene-phosphine ylides. In this report we successfully used three different phosphine stabilized Cu(I) complexes (1–3) as catalysts for chemoselective carbene insertion into the N–H bond of different aromatic amines over the formation of olefin (carbene dimerized product). In order to understand the
Metal-Free Insertion of Sulfoxonium Ylides into Arylamines in Water
作者:Mei Guan、Yong Wu、Hua He、Kaichuan Yan、Jianglian Li、Ruizhi Lai、Yi Luo
DOI:10.1055/s-0040-1707186
日期:——
bond formation in recent years. However, the existing methods suffer from unstable starting materials, expensive metal catalysts and organic solvents. Herein, insertion of sulfoxonium ylides into arylamines under metal-free conditions has been developed. The method employs water as solvent at mild temperature and is amenable to the late-stage modification of structurally complex bioactive compounds
The Pd-catalyzed cross-coupling ethoxycarbonylation of aryl boronic acids with N-aryl-α-iminoesters affords aryl carboxylic esters via carbonyl-imino Ï bond cleavage. This unprecedented mode of reaction allows regioselective installation of the ethoxycarbonyl group into target molecules. Mechanism studies have revealed that an unusual 1,2-aryl shift process is involved in the transformation.
Palladium-catalyzed carbenoid based N–H bond insertions: application to the synthesis of chiral α-amino esters
作者:Gang Liu、Jian Li、Lin Qiu、Li Liu、Guangyang Xu、Bing Ma、Jiangtao Sun
DOI:10.1039/c3ob41331d
日期:——
A highly efficient palladium-catalyzed carbenoid based NâH bond insertion has been developed. The α-amino esters were obtained in high isolated yields. Moreover, by choosing a suitable chiral auxiliary, stereoselective Pd-catalyzed NâH insertion has been realized. The chiral α-amino esters were obtained in high yields (up to 91%) and with excellent diastereoselectivities (d.r. > 19â:â1).