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Title: Redox-Noninnocent Ligand-Supported Vanadium Catalysts for the Chemoselective Reduction of C=X (X = O, N) Functionalities

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.9b07062· OSTI ID:1570623

Catalysis is the second largest application for V after its use as an additive to improve steel production. Molecular complexes of vanadium(V) are particularly useful and efficient catalysts for oxidation processes; however, their ability to catalyze reductive transformations has yet to be fully explored. Here we report the first examples of polar organic functionality reduction mediated by V. Open-shell VIII complexes that feature a π-radical monoanionic 2,2':6',2"-terpyridine ligand (Rtpy) functionalized at the 4'-position (R = (CH3)3SiCH2, C6H5) catalyze mild and chemoselective hydroboration and hydrosilylation of functionalized ketones, aldehydes, imines, esters, and carboxamides with turnover numbers (TONs) of up to ~1000 and turnover frequencies (TOFs) of up to ~500 h–1. In conclusion, computational evaluation of the precatalyst synthesis and activation has revealed underappreciated complexity associated with the redox-active tpy chelate.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1570623
Report Number(s):
LA-UR-19-22935
Journal Information:
Journal of the American Chemical Society, Vol. 141, Issue 38; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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Cited By (3)

Polyaromatic hydrocarbon derivatized azo-oximes of cobalt( iii ) for the ligand-redox controlled electrocatalytic oxygen reduction reaction journal January 2020
1-D manganese( ii )-terpyridine coordination polymers as precatalysts for hydrofunctionalisation of carbonyl compounds journal January 2020
Lithium amide catalyzed hydroboration of nitriles journal January 2020