The Rh(III)-catalyzed amidation of C(sp2)-H bonds has been reported by employing the N-methoxyamide as a novel amino source. An excellent level of functional group tolerance can be achieved when N-methoxyamide derivatives are used as the amidating reagents. Importantly, several known bioactive compounds such as Aminalon, Pregabalin, Gabapentin, and Probenecid can be transformed to effective amidating
Rhodium(<scp>iii</scp>)-catalyzed C–H/C–C activation sequence: vinylcyclopropanes as versatile synthons in direct C–H allylation reactions
作者:Jia-Qiang Wu、Zhi-Ping Qiu、Shang-Shi Zhang、Jing-Gong Liu、Ye-Xing Lao、Lian-Quan Gu、Zhi-Shu Huang、Juan Li、Honggen Wang
DOI:10.1039/c4cc07839j
日期:——
Succession of C-Hactivation and C-Cactivation was achieved by using a single rhodium(III) catalyst. Vinylcyclopropanes were used as versatile coupling partners. Mechanistic studies suggest that the olefin insertion step is rate-determining and a facile beta-carbon elimination is involved, which represents a novel ring opening mode of vinylcyclopropanes.
Rh-Catalyzed annulations of N-methoxybenzamides with ketenimines: synthesis of 3-aminoisoindolinones and 3-diarylmethyleneisoindolinones with strong aggregation induced emission properties
作者:Xiaorong Zhou、Zhixing Peng、Hongyang Zhao、Zhiyin Zhang、Ping Lu、Yanguang Wang
DOI:10.1039/c6cc05456k
日期:——
Rhodium-catalyzed C–H activation/annulation reactions of ketenimines with N-methoxybenzamides furnished 3-aminoisoindolin-1-ones and 3-(diarylmethylene)isoindolin-1-ones.
Rhodium(<scp>iii</scp>)-catalyzed chemodivergent annulations between <i>N</i>-methoxybenzamides and sulfoxonium ylides <i>via</i> C–H activation
作者:Youwei Xu、Guangfan Zheng、Xifa Yang、Xingwei Li
DOI:10.1039/c7cc07753j
日期:——
Chemodivergent and redox-neutral annulations between N-methoxybenzamides and sulfoxonium ylides have been realized via Rh(III)-catalyzed C–H activation. The sulfoxonium ylide acts as a carbene precursor, and coupling occurs under acid-controlled conditions, where Zn(OTf)2 and PivOH promote chemodivergent cyclizations.
The synthesis of isoindolinones from N-methoxy benzamides and saturatedketones via a bimetallic tandem catalytic annulation has been accomplished. The reaction is catalyzed by a Rh/Cu-cocatalytic system and proceeds via the combination of Cu-catalyzed dehydrogenation of ketones and Rh-catalyzed direct C–H functionalization with the assistance of the N-methoxy amide group which also acts as an oxidant