Patel SM, P EP, Bakthadoss M, Sharada DS. Photocatalytic Visible-Light-Induced Nitrogen Insertion via Dual C(sp
3)-H and C(sp
2)-H Bond Functionalization: Access to Privileged Imidazole-based Scaffolds.
Org Lett 2021;
23:257-261. [PMID:
33373256 DOI:
10.1021/acs.orglett.0c03269]
[Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Here we have demonstrated a visible-light-mediated metal-free organic-dye-catalyzed dehydrogenative N-insertion leading to highly substituted imidazoles and privileged dihydroisoquinoline-based imidazole derivatives via C(sp3)-H and C(sp2)-H bond functionalization. A sustainable, convenient, metal-free azidation/C-H aminative cyclization approach in the absence of stoichiometric oxidants is presented. This protocol involves a rare photoinduced iminyl radical as a key intermediate for the "N" insertion.
Collapse