Cobalt-Catalyzed Switchable Intramolecular Thioenolization/C–H Thiolation and C(sp<sup>2</sup>)–H/C(sp<sup>3</sup>)–H Dehydrogenative Coupling
作者:Zhi Yao、Zhongliang Cai、Long Zhen、Liqin Jiang
DOI:10.1021/acs.orglett.0c01514
日期:2020.6.5
C(sp2)–H/C(sp3)–H dehydrogenativecouplings of N-aryl-N-alkyl-thioamides are developed, providing 2-methylene-2,3-dihydrobenzo[d]thiazoles and thio-oxindoles in moderate to excellent yields from the same precursors, respectively. Details mechanistic studies suggest that the thioenolization/C–H thiolation process involves a radical mechanism, whereas the C(sp2)–H/C(sp3)–H dehydrogenativecoupling might proceed
Ligand-free iron/copper cocatalyzed N-arylations of aryl halides with amines under microwave irradiation
作者:Diliang Guo、He Huang、Yu Zhou、Jinyi Xu、Hualiang Jiang、Kaixian Chen、Hong Liu
DOI:10.1039/b917010c
日期:——
Ligand-free iron/copper cocatalyzed cross-coupling reactions of arylhalides with amines were carried out to provide the corresponding coupling products in good yields. It is worth noting that the method displays a broad substrate scope, and is convenient, rapid, low-cost and environmentally friendly.
Efficient Ligand-Free Copper-Catalyzed Arylation of Aliphatic Amines
作者:Yong-Chua Teo、Fui-Fong Yong
DOI:10.1055/s-0030-1259049
日期:2010.12
An efficient and practical protocol has been developed for the cross-coupling of alkyl amines and aryl iodides under ligand-free copper(I) iodide catalyzed conditions. A variety of alkyl amines undergo the catalytic system to afford the N-arylated products in moderate to good yields (up to 93%).
Ligand- and Base-Free Copper(II)-Catalyzed C−N Bond Formation: Cross-Coupling Reactions of Organoboron Compounds with Aliphatic Amines and Anilines
作者:Tan D. Quach、Robert A. Batey
DOI:10.1021/ol035681s
日期:2003.11.1
[reaction: see text] A ligandless and base-free Cu-catalyzed protocol for the cross-coupling of arylboronic acids and potassium aryltrifluoroborate salts with primary and secondary aliphatic amines and anilines is described. The process utilizes catalytic copper(II) acetate monohydrate and 4 A molecular sieves in dichloromethane at slightly elevated temperatures under an atmosphere of oxygen. A broad
Efficient Iron-Catalyzed N-Arylation of Aryl Halides with Amines
作者:Diliang Guo、He Huang、Jinyi Xu、Hualiang Jiang、Hong Liu
DOI:10.1021/ol801784a
日期:2008.10.16
A practical and promising protocol was developed for N-arylations of various amines with differently substituted aryl halides. The processes are efficiently promoted by the catalyst system involving the environmentally benign Fe2O3 and the universal ligand L-proline. The versatility, convenient operation, low cost, and environmental friendliness, in combination with the high yields, render this method