Treatment of structurally diverse alcohols with dimethyl sulfoxide in the presence of trichloromethyl chloroformate (phosgene dimer) and triethylamine efficiently afforded the corresponding aldehydes or ketones in excellent yields.
Selective Catalytic Hydrogenation of Arenols by a Well-Defined Complex of Ruthenium and Phosphorus–Nitrogen PN<sup>3</sup>–Pincer Ligand Containing a Phenanthroline Backbone
Selective catalytic hydrogenation of aromatic compounds is extremely challenging usingtransition-metalcatalysts. Hydrogenation of arenols to substituted tetrahydronaphthols or cyclohexanols has been reported only with heterogeneouscatalysts. Herein, we demonstrate the selectivehydrogenation of arenols to the corresponding tetrahydronaphthols or cyclohexanols catalyzed by a phenanthroline-based
In the presence of a Ni–Mg–Al layered triple hydroxide-supported Pd catalyst, the acceptorless dehydrogenative aromatization of a wide range of substrates efficiently proceeded with the liberation of molecular hydrogen.
We have developed a highly efficient heterogeneous catalytic system using hydrotalcite-supported Cu nanoparticles (Cu/HT) that can successfully promote the oxidant-freedehydrogenation of various alcohols under liquid-phase conditions.
Phosphine Effects in the Copper(I) Hydride-Catalyzed Hydrogenation of Ketones and Regioselective 1,2-Reduction of α,β-Unsaturated Ketones and Aldehydes. Hydrogenation of Decalin and Steroidal Ketones and Enones
作者:Jian-Xin Chen、John F. Daeuble、Jeffrey M. Stryker
DOI:10.1016/s0040-4020(00)00133-2
日期:2000.4
The stereoselectivity and regioselectivity of the catalytic hydrogenation of ketones and α,β-unsaturated ketones and aldehydes using soluble copper(I) hydride catalysts have been investigated as a function of the ancillary phosphine ligand. While a relatively narrow range of aryldialkylphosphine ligands produce active hydrogenation catalysts, some ligands provide higher selectivity for 1,2-reduction