作者:Zongyang Li、Tongyu Huo、Li Li、Shuo Feng、Qian Wang、Zhen Zhang、Sen Pang、Zhiyuan Zhang、Peng Wang、Zhenhua Zhang
DOI:10.1021/acs.orglett.8b03115
日期:2018.12.21
In contrast to well-known transformations of vinyl azides via azirine intermediates or initiating at the alkene moiety, herein we report a Rh(I)-catalyzed coupling reaction of vinyl azides with isonitriles at the azide moiety to form active vinyl carbodiimide intermediates and following tandem cyclization with unsaturated compounds, such as alkynes and benzynes, to give different classes of azaheterocycles
与通过叠氮基中间体或起始于烯烃部分的乙烯基叠氮化物的众所周知的转化相反,本文中我们报道了Rh(I)催化的叠氮化物部分上的乙烯基叠氮化物与异腈形成活性乙烯基碳二亚胺中间体并随后串联与不饱和化合物(例如炔烃和苯炔烃)环合,得到不同种类的氮杂杂环。从机理上讲,受控实验和DFT计算表明,Rh-nitrene是第一步偶联过程中的重要物质,Rh(I)催化剂也可以在炔烃的环化步骤中发挥重要作用。