Palladium(II)-Catalyzed Oxidative Homo- and Cross-Coupling of Aryl <i>ortho</i>-sp<sup>2</sup> C–H Bonds of Anilides at Room Temperature
作者:Chong Mei、Wenjun Lu
DOI:10.1021/acs.joc.8b00120
日期:2018.4.20
The preparation of secondary 2,2′-bisanilides has been successfully achieved through an oxidative coupling of aryl ortho-sp2 C–H bonds of anilides in the presence of catalytic Pd(OAc)2 and K2S2O8 as an oxidant in MsOH/CF3CO2H (TFA) at roomtemperature (25 °C). The aromatic rings of anilides substituted by various electron-donating or electron-withdrawing groups are tolerant in these coupling reactions
通过在催化性Pd(OAc)2和K 2 S 2 O 8作为氧化剂的存在下,通过对苯甲酸酯的芳基邻-sp 2 C-H键进行氧化偶联,成功地完成了2,2'-双苯胺的制备。在室温(25°C)下在MsOH / CF 3 CO 2 H(TFA)中溶解。在这些偶联反应中,被各种给电子或吸电子基团取代的苯甲酸酯的芳环是可容忍的。
Oxidative C−H/C−H Cross-Coupling Reactions between <i>N</i>
-Acylanilines and Benzamides Enabled by a Cp*-Free RhCl<sub>3</sub>
/TFA Catalytic System
作者:Yang Shi、Luoqiang Zhang、Jingbo Lan、Min Zhang、Fulin Zhou、Wenlong Wei、Jingsong You
DOI:10.1002/anie.201804528
日期:2018.7.16
oxidative C−H/C−H cross‐coupling reaction between an N‐acylaniline and a benzamide has been accomplished for the first time. This process constitutes a step‐economic and highly efficient pathway to 2‐amino‐2′‐carboxybiaryl scaffolds from readily available substrates. A Cp*‐free RhCl3/TFA catalytic system was developed to replace the [Cp*RhCl2]2/AgSbF6 system generally used in oxidative C−H/C−H cross‐coupling
Biphenyl-Based Diaminophosphine Oxides as Air-Stable Preligands for the Nickel-Catalyzed Kumada-Tamao-Corriu Coupling of Deactivated Aryl Chlorides, Fluorides, and Tosylates
couple: Cooperative bimetallic activation of CF and CO bonds gave rise to easy coupling with arylfluorides and tosylates. Novel air‐ and moisture‐stable diaminophosphine oxides derived from 1,1′‐biphenyl‐2,2′‐diamine proved to be versatile preligands for the nickel‐catalyzed cross‐coupling of aryl Grignard reagents with a variety of deactivated aryl chlorides, fluorides, and tosylates (see scheme)
Seven-membered heterocyclic carbenes and their metal complexes
申请人:Stahl S. Shannon
公开号:US20060229448A1
公开(公告)日:2006-10-12
Disclosed are carbenes of the general formula:
and including salts thereof, and metal complexes thereof. The carbenes are useful in any reaction where carbenes and carbene-metal complexes are used. The carbenes disclosed herein are particularly useful in asymmetric catalysis.
Development of 7-membered N-heterocyclic carbene ligands for transition metals
作者:Christopher C. Scarborough、Brian V. Popp、Ilia A. Guzei、Shannon S. Stahl
DOI:10.1016/j.jorganchem.2005.08.022
日期:2005.12
bearing seven-membered NHCs as ancillary ligands. The identity of nitrogen substituent, neopentyl versus 2-adamantyl, influences the synthetic accessibility and stability of the seven-membered amidinium salts and the NHC–metal complexes obtained via in situ deprotonation/metallation. Computational analysis of the seven-memberedring structures reveals the Hückel antiaromatic 8π electron system achieves