Metal-Mediated Production of Isocyanates, R3EN=C=O from Dinitrogen, Carbon Dioxide, and R3ECl
A highly efficient and versatile chemical cycle has been developed for the production of isocyanates through the molecular fixation of N2, CO2 and R3ECl (E=C, Si, and Ge). Key steps include a 'one-pot' photolytic N-N bond cleavage of a Group6 dinuclear dinitrogen complex with insitu trapping by R3ECl to provide a metal terminal imido complex that can engage in simultaneous nitrene-group transfer and oxygen-atom transfer to generate an intermediate metal terminal oxo complex with release of the isocyanate product. Reaction of the oxo complex with additional equivalents of R3ECl regenerates a metal dichloride that is the precursor for dinuclear dinitrogen starting material.
Keane, Andrew J.,Farrell, Wesley S.,Yonke, Brendan L.,Zavalij, Peter Y.,Sita, Lawrence R.
supporting information
p. 10220 - 10224
(2015/09/01)
Heterogeneous-gold-catalyzed acceptorless cross-dehydrogenative coupling of hydrosilanes and isocyanic acid generated in situ from urea
Support structure: In the presence of gold nanoparticles supported on alumina (Au/Al2O3), various hydrosilanes can be converted into the corresponding silyl isocyanates using urea as an isocyanate source. The observed catalysis is truly heterogeneous, and the retrieved Au/Al 2O3 catalyst can be reused several times without any loss of its high catalytic performance. Copyright
ULTRAVIOLET SPECTROSCOPIC INVESTIGATION OF ISOCYANATO- AND ISOTHIOCYANATO SILANES CONTAINING PHENYL- AND METHYL GROUPS
The members of the series R(n)Si(NCO)(4-n) and R(n)Si(NCS)(4-n), where R = -CH3 and -C6H5, were prepared, their ultraviolet spectra recorded and the observed bands assigned.The spectra were compared to those of halogeno derivatives.The similarity of halogen- and pseudohalogeno-groups and difference between the effect of methyl- and phenyl-groups were studied.
Veszpremi, Tamas,Barta, Istvan,Nagy, Jozsef
p. 243 - 250
(2007/10/02)
REACTIONS OF UREA WITH CHLOROSILANES: SYNTHESIS OF ISOCYANATOSILANES
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Kozyukov, V. P.,Muzovskaya, E. V.,Mironov, V. F.
p. 972 - 978
(2007/10/02)
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