A highly efficient heterogeneous copper-catalyzed Chan–Lam coupling reaction of sulfonyl azides with arylboronic acids leading to N-arylsulfonamides
作者:Chongren You、Fang Yao、Tao Yan、Mingzhong Cai
DOI:10.1039/c6ra04298h
日期:——
A heterogeneous Chan–Lam coupling reaction between sulfonyl azides and arylboronicacids was achieved in MeOH at room temperature in the presence of 10 mol% of an L-proline-functionalized MCM-41-immobilized copper(I) complex [MCM-41–L-proline–CuCl] under air, yielding a variety of N-arylsulfonamides in excellent yields. The new heterogeneous copper complex can be prepared from commercially readily
A novel one-step direct reductive coupling reaction between nitroarenes and sodium arylsulfinates was realized in the presence of an inexpensive Pd/C catalyst. In this procedure, readily available nitroarenes are employed as the nitrogen sources, and sodium arylsulfinates serve as both coupling partners and reductants. The method features high efficiency by using cheap Pd/C with low catalyst loading
Direct CH Amidation of Benzoic Acids to Introduce<i>meta</i>- and<i>para</i>-Amino Groups by Tandem Decarboxylation
作者:Donggun Lee、Sukbok Chang
DOI:10.1002/chem.201500331
日期:2015.3.27
The Ir‐catalyzed mild CH amidation of benzoicacids with sulfonyl azides was developed to give reactions with high efficiency and functional‐group compatibility. Subsequent protodecarboxylation of ortho‐amidated benzoicacid products afforded meta‐ or para‐substituted (N‐sulfonyl)aniline derivatives, the latter being inaccessible by other CH functionalization approaches. The decarboxylation step
Accessing bridged bicyclic compounds or meta carbon-functionalized anilines from the dearomatization of anilines
作者:Linfei Wang、Shuo-En Wang、Weibin Wang、Renhua Fan
DOI:10.1039/c3ra23224g
日期:——
The oxidative dearomatization of anilines was combined with a domino Michael addition, providing a series of nitrogen-containing bridged bicyclic compounds in moderate to excellent yields. The bridged bicyclic compound could be converted into the corresponding meta carbon-functionalized aniline derivative via a quinine-catalyzed tandem retro-oxa-Michael addition–aromatization reaction.
Selective C3C3 Oxidative Cross-Coupling between Unactivated Anilines and Indoles
作者:Linfei Wang、Zhaomeng Han、Renhua Fan
DOI:10.1002/adsc.201000603
日期:2010.12.17
A selective C3C3 oxidativecross-couplingbetweenunactivatedanilines and indoles catalyzed by copper bromide together with iodobenzene diacetate as the oxidant is described. This methodology provides a novel approach to biaryl synthesis.