The invention provides a compound of formula I:or a salt thereof, wherein R
3
-R
8
and X and Y have any of the values described in the specification, as well as compositions comprising a compound of formula I. The compounds are useful as antibacterial agents.
Substrate‐Rhodium Cooperativity in Photoinduced
<i>ortho</i>
‐Alkynylation of Arenes
作者:Argha Saha、Animesh Ghosh、Srimanta Guin、Sanjib Panda、Dibya Kanti Mal、Abhirup Majumdar、Munetaka Akita、Debabrata Maiti
DOI:10.1002/anie.202210492
日期:2022.10.17
AbstractIn 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‐catalyzedortho‐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 sp3‐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.
The invention provides a compound of formula I:or a salt thereof, wherein R3-R8 and X and Y have any of the values described in the specification, as well as compositions comprising a compound of formula I. The compounds are useful as antibacterial agents.