A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Recommanded Product: 591-11-7, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 591-11-7, Name is 5-Methylfuran-2(5H)-one, molecular formula is C5H6O2. In an article, author is Arevalo, Rebeca,once mentioned of 591-11-7.
C(sp(2))-H Borylation of Heterocycles by Well-Defined Bis(silylene)pyridine Cobalt(III) Precatalysts: Pincer Modification, C(sp(2))-H Activation, and Catalytically Relevant Intermediates
Well defined bis(silylene)pyridine cobalt(III) pre-catalysts for C(sp(2))-H borylation have been synthesized and applied to the investigation of the mechanism of the catalytic borylation of furans and 2,6-lutidine. Specifically, [((SiNSi)-Si-Ar)-CoH3]center dot NaHBEt3 {(SiNSi)-Si-Ar = 2,6-[EtNSi((NBu)-Bu-t)(2)CAr](2)C5H3N, where Ar = C6H5 (1-H-3 center dot NaHBEt3) or 4-MeC6H4 (2-H-3 center dot NaHBEt3)} and trans-[((SiNSi)-Si-Ar)Co(H)(2) BPin] {Ar =C6H5 [1-(H)(2)BPin] or 4-MeC6H4 [2-(H)(2)BPin], and Pin = pinacolato} were prepared and employed as single-component precatalysts for the C(sp(2))-H borylation of 2-methylfuran, benzofuran, and 2,6-lutidine. The cobalt(III) precursors, 2-H-3 center dot NaHBEt3 and 2-(H)(2)BPin, also promoted C(sp(2))-H activation of benzofuran, yielding [((SiNSi)-Si-Ar)CoH(Bf)(2)] {Ar = 4-MeC6H4 [2-H(Bf)(2)], and Bf = 2-benzofuranyl}. Monitoring the catalytic borylation of 2-methylfuran and 2,6-lutidine by H-1 NMR spectroscopy established the trans-dihydride cobalt(III) boryl as the catalyst resting state at low substrate conversions. At higher conversions, two distinct pincer modification pathways were identified, depending on the substrate and the boron source.
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Reference:
Benzofuran – Wikipedia,
,Benzofuran | C8H6O – PubChem