Copper-Mediated Reduction of CO2 with pinB-SiMe2Ph via CO2 Insertion into a Copper–Silicon Bond
摘要:
Reaction of [(IPr)Cu-OtBu] (1) with pinB-SiMe2Ph (2) leads to the Cu-silyl complex [(IPr)Cu-SiMe2Ph] (3). Insertion of CO2 into the Cu-Si bond of 3 is followed by transformation of the resulting silanecarboxy complex [(IPr)Cu-O2CSiMe2Ph] (4) to the silanolate complex [(IPr)Cu-OSiMe2Ph] (5) via extrusion of CO. As 5 reacts readily with 2 to regenerate 3, a catalytic CO2 reduction to CO is feasible. The individual steps were studied by in situ C-13 NMR spectroscopy of a series of stoichiometric reactions. Complexes 3, 4, and 5 were isolated and fully characterized, including single-crystal X-ray diffraction studies. Interestingly, the catalytic reduction of CO2 using silylborane 2 as a stoichiometric reducing agent leads not only to CO and pinB-O-SiMe2Ph but also to PhMe2Si-CO2-SiMe2Ph as an additional reduction product.
Ruthenium-catalysed multicomponent synthesis of borasiloxanes
作者:Basujit Chatterjee、Chidambaram Gunanathan
DOI:10.1039/c7cc00787f
日期:——
We present the selective atom economical synthesis of borasiloxanes using a multi-component approach directly from the one-pot ruthenium catalysed reaction of boranes, silanes and water
Synthesis of borasiloxanes by oxidative hydrolysis of silanes and pinacolborane using Cu<sub>3</sub>(BTC)<sub>2</sub> as a solid catalyst
作者:Amarajothi Dhakshinamoorthy、Abdullah M. Asiri、Patricia Concepcion、Hermenegildo Garcia
DOI:10.1039/c7cc05221a
日期:——
This work reports the synthesis of borasiloxanes from silanes and pinacolboranes using Cu3(BTC)2 as a heterogeneous catalyst in acetonitrile under mild conditions.
A convenient and clean synthetic method for borasiloxanes by Pd-catalysed reaction of silanols with diborons
作者:Aya Yoshimura、Michiyo Yoshinaga、Hiroshi Yamashita、Masayasu Igarashi、Shigeru Shimada、Kazuhiko Sato
DOI:10.1039/c7cc02420g
日期:——
Selective O-borylation of silanols with diborons took place in the presence of Pd catalysts to give the corresponding boryl silylethers in high yields.