铑
化学
催化作用
光催化
背景(考古学)
光化学
基质(水族馆)
催化循环
合作性
组合化学
有机化学
生物化学
生物
海洋学
地质学
古生物学
作者
Argha Saha,Animesh Ghosh,Srimanta Guin,Sanjib Panda,Dibya Kanti Mal,Abhirup Majumdar,Munetaka Akita,Debabrata Maiti
标识
DOI:10.1002/anie.202210492
摘要
Abstract In the realm of metallaphotocatalytic C−H activation strategy, the direct excitation of the transition metal which plays the dual role of light energy harnessing alongside performing the bond breaking and forming is a rare phenomenon. In this context we have developed the first photo‐induced Rh‐catalyzed ortho ‐alkynylation under ambient conditions without the requirement of silver salt, photocatalyst (PC) or any engineered substrate or catalyst. The transformation functions by the specific cooperative effect of a six‐membered rhodacycle which is the photo‐responsive species. The catalytic system allows the conjugation of arenes with sp 3 ‐rich pharmacophoric fragments. The control experiments as well as the computational studies resolve the mechanistic intricacies for this transformation. An outer sphere electron transfer process from Rh to alkynyl radical is operative for the present photo‐induced transformation over the more common oxidative addition or 1,2‐migratory insertion pathways.
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