Esteruelas, Miguel A.; Martinez, Antonio; Olivan, Montserrat; Onate, Enrique published the artcile< Direct C-H Borylation of Arenes Catalyzed by Saturated Hydride-Boryl-Iridium-POP Complexes: Kinetic Analysis of the Elemental Steps>, Product Details of C19H34O2, the main research area is carbon hydrogen bond borylation arene catalyst boryliridium hydride; isotope effect borylation arene catalyst boryliridium hydride; reductive elimination kinetics boryl iridium hydride pincer complex; B−H activation; C−H activation; arene borylation; iridium; pincer ligand.
The saturated trihydride IrH3{κ3-P,O,P-[xant(PiPr2)2]} (1; xant(PiPr2)2 = 9,9-dimethyl-4,5-bis(diisopropylphosphino)xanthene) activates the B-H bond of two mols. of pinacolborane (HBpin) to give H2, the hydride-boryl derivatives IrH2(Bpin){κ3-P,O,P-[xant(PiPr2)2]} (2) and IrH(Bpin)2{κ3-P,O,P-[xant(PiPr2)2]} (3) in a sequential manner. Complex 3 activates a C-H bond of two mols. of benzene to form PhBpin and regenerates 2 and 1, also in a sequential manner. Thus, complexes 1, 2, and 3 define two cycles for the catalytic direct C-H borylation of arenes with HBpin, which have dihydride 2 as a common intermediate. C-H bond activation of the arenes is the rate-determining step of both cycles, as the C-H oxidative addition to 3 is faster than to 2. The results from a kinetic study of the reactions of 1 and 2 with HBpin support a cooperative function of the hydride ligands in the B-H bond activation. The addition of the B atom of the borane to a hydride facilitates the coordination of the B-H bond through the formation of κ1- and κ2-dihydrideborate intermediates.
Chemistry – A European Journal published new progress about Aromatic compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.
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