Nickel Schiff-base complexes immobilized on boehmite nanoparticles and their application in the oxidation of sulfides and oxidative coupling of thiols as novel and reusable nano organometal catalysts
Ni-complex-boehmite was prepared in water at room temperature using commercially available materials and applied as an efficient nanocatalyst in the oxidation of sulfides and thiols.
Experimental and theoretical studies of the gas-phase protonation of vinyl ethers, vinyl sulfides, and vinyl selenides
作者:K. Osapay、J. Delhalle、K. M. Nsunda、E. Rolli、R. Houriet、L. Hevesi
DOI:10.1021/ja00196a002
日期:1989.7
Determination des affinites protoniques par mesure des basicites en phase gazeuse dans un spectrometre a resonance cyclotronique ionique et etude theorique par calculs ab initio MO aux niveaux STO-3G et 3-21G*
Determination des affinites protoniques par mesure des basicites en phasegazeuse dans un spectrometer a Resonance cyclotronique ionique etude theorique par calculs ab initio MO aux niveaux STO-3G et 3-21G*
Difluoro- and trifluoro diazoalkanes – complementary approaches in batch and flow and their application in cycloaddition reactions
作者:Katharina J. Hock、Lucas Mertens、Friederike K. Metze、Clemens Schmittmann、Rene M. Koenigs
DOI:10.1039/c6gc03187k
日期:——
Herein we report on applications of fluorinated diazoalkanes in cycloaddition reactions, with the emphasis on studying subtle differences between diverse fluorinated diazo compounds. These differences led to two major synthetic...
Cycloadditions of nitrile oxides to 2,3-dihydrofuran are highly regioselective whereas the regioselectivity of the cycloadditions to 2,3-dihydrothiophen is only moderate. The directing effect of oxygen and sulfur in these cycloadditions could be evaluated at 2.8 and 1.1 Kcal mol-1 respectively. The related acyclic sulfur dipolarophiles, (E)-propenyl methyl and phenyl sulfides, similarly undergo cycloadditions
[2 + 2] cycloadditions of 2,2-bis(trifluoromethyl)ethylene-1,1-dicarbonitrile with vinyl sulfides and ketene S,S-acetals
作者:Reinhard Brückner、Rolf Huisgen
DOI:10.1016/0040-4039(90)80125-6
日期:1990.1
In its [2+2] cycloadditions to vinyl sulfides, the title olefin (BTF) exceeds tetracyanoethylene up to 8200-fold in rate, but is more sensitive to steric hindrance by β-substituents in the donor olefin; some vinyl sulfides react faster than vinylethers with BTF. The dependence of rate on solvent polarity Is In harmony with zwitterionic Intermediates.