Synthesis of Ruthenium Boryl Analogues of the Shvo Metal-Ligand Bifunctional Catalyst.
Synthesis of Ruthenium Boryl Analogues of the Shvo Metal-Ligand Bifunctional Catalyst.
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DOI:
10.1021/om1005808
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发表时间:
2010
期刊:
影响因子:
2.8
通讯作者:
Clark TB
中科院分区:
文献类型:
--
作者:
Koren-Selfridge L;Query IP;Hanson JA;Isley NA;Guzei IA;Clark TB
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-Ph2-3,4-Tol2(η5-C4COBcat)Ru(CO)2Bcat] (Bcat = catecholatoboryl). Addition of bis(catecholato)diboron to complex 1 in the presence of a phenol results in ruthenium boryl complex5 [2,5-Ph2-3,4-Tol2(η5-C4COH)Ru(CO)2Bcat] 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-Ph2-3,4-Tol2(η5-C4COBcat)Ru(CO)2Bcat] followed by addition of the phenol, resulting in a 51% yield.
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