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Synthesis of Ruthenium Boryl Analogues of the Shvo Metal-Ligand Bifunctional Catalyst.


ABSTRACT: Metal boryl complexes have received significant attention in the literature in recent years due to their role as key intermediates in a number of metal-catalyzed borylation reactions. The ligand scaffold is known to have a significant impact on the observed reactivity of these metal boryl complexes. A synthetic strategy to access ruthenium boryl analogues of the Shvo metal-ligand catalysts is described. Heating a precursor to Shvo's catalyst (1) with bis(catecholato)diboron at 50 °C provided ruthenium boryl complex 3 [2,5-Ph(2)-3,4-Tol(2)(?(5)-C(4)COBcat)Ru(CO)(2)Bcat] (Bcat = catecholatoboryl). Addition of bis(catecholato)diboron to complex 1 in the presence of a phenol results in ruthenium boryl complex5 [2,5-Ph(2)-3,4-Tol(2)(?(5)-C(4)COH)Ru(CO)(2)Bcat] at 22 °C in 30% isolated yield. A single crystal X-ray analysis of complex 5 confirmed the assigned structure. An improved synthesis of ruthenium boryl complex 5 was developed by the in situ formation of complex 3 [2,5-Ph(2)-3,4-Tol(2)(?(5)-C(4)COBcat)Ru(CO)(2)Bcat] followed by addition of the phenol, resulting in a 51% yield.

SUBMITTER: Koren-Selfridge L 

PROVIDER: S-EPMC2934784 | biostudies-literature | 2010

REPOSITORIES: biostudies-literature

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Synthesis of Ruthenium Boryl Analogues of the Shvo Metal-Ligand Bifunctional Catalyst.

Koren-Selfridge Liza L   Query Ian P IP   Hanson Joel A JA   Isley Nicholas A NA   Guzei Ilia A IA   Clark Timothy B TB  

Organometallics 20100101 17


Metal boryl complexes have received significant attention in the literature in recent years due to their role as key intermediates in a number of metal-catalyzed borylation reactions. The ligand scaffold is known to have a significant impact on the observed reactivity of these metal boryl complexes. A synthetic strategy to access ruthenium boryl analogues of the Shvo metal-ligand catalysts is described. Heating a precursor to Shvo's catalyst (1) with bis(catecholato)diboron at 50 °C provided rut  ...[more]

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