Shi Y, Ma H, Shao J, Deng C. Theoretical studies on the mechanism of Pd
2+-catalyzed regioselective C-H alkylation of indole with MesICH
2CF
3OTf.
J Mol Model 2021;
27:150. [PMID:
33945013 DOI:
10.1007/s00894-021-04773-6]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 04/21/2021] [Indexed: 11/26/2022]
Abstract
The reaction mechanism of Pd2+-catalyzed regioselective C-H alkylation of indole with MesICH2CF3OTf has been investigated by the density functional theory calculations. The reaction mechanism mainly contains four steps: C-H activation, oxidative addition, reductive elimination, and ligands substitution. From our calculations, we find that the C-H activation step was realized by the acetate anion (-OAc) assisted concerted metalation deprotonation (CMD) process and the transition state of C-H activation process is a square planar configuration. Moreover, the calculation results suggest that the regioselectivity of C-H bond alkylation of indole with MesICH2CF3OTf can be ascribed to the different stability of the CMD transition states in C-H activation step and the relative stabilities of deprotonated intermediates.
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