Journal
NATURE COMMUNICATIONS
Volume 12, Issue 1, Pages -Publisher
NATURE RESEARCH
DOI: 10.1038/s41467-021-23371-x
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21871145, 91856104]
- Tianjin Applied Basic Research Project and Cutting-Edge Technology Research Plan [19JCZDJC37900]
Ask authors/readers for more resources
The study demonstrates a novel approach for the direct construction of 7-membered rings via Ni-Al co-catalyzed unreactive C-H cyclization of benzoimidazoles with alkenes, yielding a series of tricyclic imidazoles. Transition metal-catalyzed C-H cyclization for medium-ring synthesis has been limited to reactive C-H bonds, presenting a challenge for activating unreactive C-H bonds.
The construction of 7-membered ring via direct C7-H cyclization of benzoimidazoles with alkenes would provide a more atom- and step-economical route to tricyclic imidazoles and derivatives that widely exist in a broad range of bioactive molecules. However, transition metal-catalyzed C-H cyclization for medium-ring synthesis has been limited to reactive C-H bonds, instead, the activation of unreactive C-H bonds towards medium synthesis still remains an elusive challenge. Herein, we report a direct construction of 7-membered rings via Ni-Al co-catalyzed unreactive C7-H cyclization of benzoimidazoles with alkenes, providing a series of tricyclic imidazoles in 40-98% yield and with up to 95:5 er. Transition metal-catalyzed C-H cyclization for medium-ring synthesis has been limited to reactive C-H bonds, the activation of unreactive C-H bonds still remains a challenge. Here the authors show the direct construction of 7-membered rings via Ni-Al co-catalyzed unreactive C-H cyclization of benzoimidazoles with alkenes, providing a series of tricyclic imidazoles.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available