Reductive amination of butanal and methyl ethyl ketone (MEK) with ammonia (at ammonia/MEK molar ratios of ~ 14.5) and hydrogen has been performed at 50 bar and 323-353 K over graphite and charcoal supported noble metal catalysts. Rhodium and platinum based catalysts showed the highest activity in reductive amination of butanal and MEK. The rhodium catalysts had high selectivity towards primary amines while the platinum catalysts towards secondary

The reductive amination of butanal with ammonia (at ammonia/butanal molar ratios of ~ 14.5) and hydrogen has been performed at 50 bar and 323-353 K over graphite and charcoal supported noble metal catalysts. Rhodium and platinum based catalysts showed the highest activity. The BET area and metal dispersion markedly influenced the activity without changing the selectivity. The products (butylamine, dibutylamine and tributylamine) were detected in

Reductive amination of methyl ethyl ketone (MEK) with ammonia (at ammonia/MEK molar ratios of ~ 14.5) and hydrogen has been performrd at 50 bar and 323-353 K over graphite and charcoal supported noble metal catalysts. Rhodium and platinum based catalysts showed the highest activity in reductive amination of MEK. The rhodium catalysts had high selectivity towards primary amine (sec-butylamine), while the platinum catalysts towards secondary amine

The direct addition of substituted aromatic amines to 1,3-cyclohexadiene was efficiently catalyzed in a liquid - liquid two phase system comprised of a polar catalyst of Zn(CF3SO3)2 in water and the substrate and reactant mixture in n-heptane. The successful replacement of 1-ethyl-3-methyl-imidazolium trifluoromethanesulfonate with water, a greener and cheaper polar solvent than any ionic liquid (IL), for hydroamination reactions of cyclohexadiene

Besides the usefulness of the resulting products, the other main goal we need to follow during every present day chemical reaction (inorganic, organic or biochemical) performed in research laboratories or industry, is to be close to “ideal synthesis” (environmentally acceptable, resource efficient, available materials, one step, safe, simple, 100% yield). Literature examples and personal contributions towards these type of syntheses will be given

Rhodium on different supports (active carbon, zeolite, SiO2, Al2O3, polymers, etc.) was found to be the most active and selective among supported transition metal catalysts for the vapor phase carbonylation of alcohols and hydrocarboxylation of alkenes to carboxylic acids. High catalyst activities and good selectivities were obtained for the carbonylation of methanol over carbon supported rhodium catalysts in tubular reactor. A detailed parameter

The direct addition of amines to alkynes and dienes (hydroamination) was efficiently catalyzed in a liquid–liquid two phase system. The latter comprised a polar catalyst phase of Zn(CF3SO3)2 in the ionic liquid 1-ethyl-3-methylimidazolium trifluoromethanesulfonate and a substrate mixture in heptane. The possibility to catalyze a variety of intermolecular hydroamination reactions was demonstrated.

This article describes the synthesis and characterization of polyisobutylene (PIB) carrying one primary hydroxyl head group and a tertiary chloride end group, [Ph-C(CH3)(CH2OH)-PIB-CH2-C(CH3)2Cl] prepared with direct functionalization via initiation. The polymerization of isobutylene was initiated with the alpha-methylstyrene epoxide/titanium tetrachloride system. Living conditions were obtained from -75 to -50 degreesC (198-223 K). Low molecular