Experimental and Theoretical Studies on Ru(II)-Catalyzed Oxidative C–H/C–H Coupling of Phenols with Aromatic Amides Using Air as Oxidant: Scope, Synthetic Applications, and Mechanistic Insights
作者:Luoqiang Zhang、Lei Zhu、Yuming Zhang、Yudong Yang、Yimin Wu、Weixin Ma、Yu Lan、Jingsong You
DOI:10.1021/acscatal.8b02816
日期:2018.9.7
synthesis of Palomid 529, a drug in development for the treatment of glioblastoma and neovascular age-related macular degeneration. With a combination of experimental and theoretical methods, we get more insight into the essential issues of strategy determining the reaction process. The stronger coordinating ability of 2-aryloxypyridine and the less steric hindrance of amide are pivotal to the high chemoselectivity
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
Synthesis of amides using the Ritter reaction with bismuth triflate catalysis
作者:Emmanuel Callens、Andrew J. Burton、Anthony G.M. Barrett
DOI:10.1016/j.tetlet.2006.10.023
日期:2006.12
N-tert-Alkyl and aryl amides were obtained by a Ritter reaction of various nitriles with tertiary alcohols in the presence of a catalytic amount of bismuth triflate.
ñ -叔-烷基和芳基酰胺通过与各种腈的Ritter反应,得到叔在三氟甲磺酸铋催化量的存在下的醇。
Efficient and Green Ritter Reaction for the Synthesis of<i>N-(t</i>-Butyl)- and<i>N</i>-Benzylamides from<i>t</i>-Butyl and Benzyl Acetates
times, the use of strong protic acids in aqueous media, toxicity and tedious work-up Either isobutylene or t-butanol in the presence of acid is employed to generate the tbutyl cation. In spite of this widely used method, some inherent problems exist; for example, the exothermic reaction of isobutylene, a gas, with acids and its susceptibility to subsequent cationic polymerization. Another complication
作者:Kai Chen、Qi-Kai Kang、Yuntong Li、Wen-Qiang Wu、Hui Zhu、Hang Shi
DOI:10.1021/jacs.1c12622
日期:2022.1.26
availability of both phenols and amines, aniline synthesis through direct coupling between these starting materials would be extremely attractive. Herein, we describe a rhodium-catalyzed amination of phenols, which provides concise access to diverse anilines, with water as the sole byproduct. The arenophilic rhodium catalyst facilitates the inherently difficult keto–enol tautomerization of phenols by means of