Karakhanov E.,Moscow State University |
Maksimov A.,Moscow State University |
Kardasheva Y.,Moscow State University |
Runova E.,Moscow State University |
And 4 more authors.
Catalysis Science and Technology | Year: 2014
A new general approach for the one-pot hydroaminomethylation of olefins using methylformate as formylating agent instead of synthesis gas (syngas) has been proposed. Herein we report that a Ru-Rh catalytic system demonstrates high activity in a tandem conversion of a series of n-alkenes into amines using methylformate with yields 58-92% (6 h). The selectivity for the normal amine reached 96% with catalysis by the Ru carbonyl complex Ru3(CO) 12, with an overall yield of 55% with respect to amine in this instance. The addition of the Rh complex to Ru catalytic system, sharply increased the hydroaminomethylation rate of both the terminal and internal alkenes and increased the yield of amines to 82-93% (6-12 h). This journal is © The Royal Society of Chemistry.
Karakhanov E.A.,Moscow State University |
Maximov A.L.,Moscow State University |
Kardasheva Y.S.,Moscow State University |
Skorkin V.A.,Moscow State University |
And 6 more authors.
Applied Catalysis A: General | Year: 2010
Copper nanoparticles have been found to be catalysts for both homogeneous (stabilized by oligoethyleneglycols) and heterogeneous (immobilized on SiO 2) hydroxylation of phenol by hydrogen peroxide to dihydroxybenzenes. The catalysts were synthesized in oligoethyleneglycols by the reduction of copper salts (supported or nonsupported) using hydrazine. For non-immobilized Cu-nanoparticles high selectivities on dihydroxybenzenes were reached at the conversion of phenol 32% for 30 min at 40 °C. It has been demonstrated that adding oxyethylated surfactants to non-immobilized nanoparticles during reaction increased selectivity for the ortho-product. Immobilized Cu-nanoparticles allowed to achieve the conversion of 69% for 15 min at 70 °C with selectivity on dihydroxybenzenes more than 95%. © 2010 Elsevier B.V.