Literature DB >> 32889757

Reaction Pathways and Redox States in α-Selective Cobalt-Catalyzed Hydroborations of Alkynes.

Clemens K Blasius1, Vladislav Vasilenko1, Regina Matveeva1, Hubert Wadepohl1, Lutz H Gade1.   

Abstract

Cobalt(II) alkyl complexes supported by a monoanionic NNN pincer ligand are pre-catalysts for the regioselective hydroboration of terminal alkynes, yielding the Markovnikov products with α:β-(E) ratios of up to 97:3. A cobalt(II) hydride and a cobalt(II) vinyl complex appear to determine the main reaction pathway. In a background reaction the highly reactive hydrido species specifically converts to a coordinatively unsaturated cobalt(I) complex which was found to re-enter the main catalytic cycle.
© 2020 The Authors. Published by Wiley-VCH GmbH.

Entities:  

Keywords:  T-shaped complex; alkenyl boronates; alkynes; cobalt; pincer ligand

Year:  2020        PMID： 32889757      PMCID： PMC7756293          DOI： 10.1002/anie.202009625

Source DB:  PubMed          Journal:  Angew Chem Int Ed Engl        ISSN： 1433-7851            Impact factor:   15.336


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6.  Preparation and reactivity of a square-planar PNP cobalt(ii)-hydrido complex: isolation of the first {Co-NO}8-hydride.

Authors:  V Mahesh Krishnan; Hadi D Arman; Zachary J Tonzetich
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7.  Cobalt-Catalyzed E-Selective Cross-Dimerization of Terminal Alkynes: A Mechanism Involving Cobalt(0/II) Redox Cycles.

Authors:  Yohei Ueda; Hayato Tsurugi; Kazushi Mashima
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Review 8.  Cobalt-Pincer Complexes in Catalysis.

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  3 in total

1.  Reaction Pathways and Redox States in α-Selective Cobalt-Catalyzed Hydroborations of Alkynes.

Authors:  Clemens K Blasius; Vladislav Vasilenko; Regina Matveeva; Hubert Wadepohl; Lutz H Gade
Journal:  Angew Chem Int Ed Engl       Date:  2020-10-15       Impact factor: 15.336

2.  Cobalt-catalyzed branched selective hydroallylation of terminal alkynes.

Authors:  Jieping Chen; Jiale Ying; Zhan Lu
Journal:  Nat Commun       Date:  2022-08-03       Impact factor: 17.694

3.  Enhanced Dihydrogen Activation by Mononuclear Iridium(II) Compounds: A Mechanistic Study.

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