Rhodium/Copper-Catalyzed Annulation of Benzimides with Internal Alkynes: Indenone Synthesis through Sequential CH and CN Cleavage
作者:Bi-Jie Li、Hao-Yuan Wang、Qi-Lei Zhu、Zhang-Jie Shi
DOI:10.1002/anie.201200271
日期:2012.4.16
Doubled up: A rhodium(III)/copper(II) system co‐catalyzes the annulation of benzimides with internal alkynes for the synthesis of indenones (see scheme; Cp*=C5Me5). The reaction involves an uncommon nucleophilic addition of a transition‐metal–carbon bond to an imide moiety. This novel reaction provides a facile route to synthesize indenones from readily available benzimides and internal alkynes.
加倍:铑(III)/铜(II)系统共催化苯并酰亚胺与内部炔烃的环化反应,以合成茚满(参见方案; Cp * = C 5 Me 5)。该反应涉及到过渡金属-碳键向酰亚胺部分的不常见亲核加成。该新颖的反应提供了从容易获得的苯甲酰亚胺和内部炔烃合成茚满的简便途径。
Cobalt(<scp>iii</scp>)-catalyzed annulation of esters and alkynes: a facile route to indenones
An efficient protocol for the synthesis of indenones has been developed from the annulation of benzoic esters and internal alkynes by exploiting cobalt catalyst.
Ferrocene-Initiated Oxidative Cyclization of Benzaldehyde with Alkyne: New Strategy to Substituted Indenones
作者:Yadong Feng、Hong Zhang、Yunliang Yu、Lei Yang、Xiuling Cui
DOI:10.1002/ejoc.201900281
日期:2019.4.30
A ferrocene‐initiated oxidativecyclization of benzaldehyde with alkyne was successfully developed as a novel strategy for the direct access to substituted indenones in high yields. The commercially available and cheap ferrocene was employed as an initiator.
Access to Indenones by Rhodium(III)-Catalyzed C–H Annulation of Arylnitrones with Internal Alkynes
作者:Zisong Qi、Mei Wang、Xingwei Li
DOI:10.1021/ol4025309
日期:2013.11
Under redox-neutral conditions, rhodium(III)-catalyzed C–H annulation of N-tert-butyl-α-arylnitrones with internal alkynes has been realized for the synthesis of indenones under mild conditions. This reaction proceeded in moderate to high yields and with good functional group tolerance.