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
Silver Tetrafluoroborate-Catalyzed Oxa-Diels-Alder Reaction Between Electrically Neutral Dienes and Aldehydes
作者:Xiaodong Zou、Lizheng Yang、Xiangli Liu、Hao Sun、Hongjian Lu
DOI:10.1002/adsc.201500487
日期:2015.10.12
Chemoselective oxa-Diels–Alder reactionsbetween electrically neutral 1,3-dienes and various aldehydes were achieved using the commercially available silver tetrafluoroborate (AgBF4) as catalyst. This catalytic process has high functional group tolerance. Heteroatoms at the β-position of the aryl aldehydes can greatly promote the reactivity of the substrates even with heterocyclic aldehydes that were
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
development of the Ir(III)-catalyzed direct C-H amidation of arenes and alkenes using acyl azides as the nitrogen source. This procedure utilizes an in situ generated cationic half-sandwich iridium complex as a catalyst. The reaction takes place under very mild conditions, and a broad range of sp(2) C-H bonds of chelate group-containing arenes and olefins are smoothly amidated with acyl azides without the intervention
Direct CH Amination of Arenes with Alkyl Azides under Rhodium Catalysis
作者:Kwangmin Shin、Yunjung Baek、Sukbok Chang
DOI:10.1002/anie.201302784
日期:2013.7.29
New horizons in the utility of azides: The rhodium‐catalyzed intermolecular directCHamination of arenes with alkyl azides provides a convenient route to N‐alkyl anilines (see scheme; DG=directing group). Alkyl azides with a wide range of functional groups reacted readily with various substrates, including benzamides, aromatic ketones, and flavones.