Ramollo GK, Strydom I, Fernandes MA, Lemmerer A, Ojwach SO, van Wyk JL, Bezuidenhout DI. Fischer Carbene Complexes of Iridium(I) for Application in Catalytic Transfer Hydrogenation.
Inorg Chem 2020;
59:4810-4815. [PMID:
32212623 PMCID:
PMC7311058 DOI:
10.1021/acs.inorgchem.0c00079]
[Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
New examples of the very rare class
of iridium(I) Fischer carbene complexes (FCCs) are reported from the
facile transmetalation from group 6 FCCs. Postcomplexation modification
of either the carbene ligand or the ancillary coligands results in
a tunable IrI metal center, for unprecedented application
as a (pre)catalyst in a benchmark transfer hydrogenation reaction.
The introduction of an aminocarbene ligand with a pendant N-donor
moiety capable of hemilabile coordination yielded the best catalytic
results with turnover frequencies reaching 445 h–1 and requiring 0.1 mol % catalyst and 0.5 mol % base loading, respectively.
A benchmark transfer hydrogenation is
catalyzed by an iridium(I) acyclic aminocarbene of the Fischer type
with a pendant N donor.
Collapse