1,721,263 research outputs found

    Les prix du passé. Desportes (F. et P.), Salvadori (P.), Mercuriales d'Amiens et de Picardie, Centre d'histoire des sociétés de l'Université de Picardie, 1990

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    Chassagne Serge. Les prix du passé. Desportes (F. et P.), Salvadori (P.), Mercuriales d'Amiens et de Picardie, Centre d'histoire des sociétés de l'Université de Picardie, 1990. In: Études Normandes, 40e année, n°3, 1991. Normands dans l'histoire. p. 95

    In Defence of the Catalytic Asymmetric cis Dihydroxylation of Olefins Utilizing Insoluble Polymeric Ligands

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    In Defense of the Catalytic Asymmetric Cis Dihydroxylation of Olefins Utilizing Insoluble Polymeric Ligand

    Insoluble polymer-bound (IPB) approach to the catalytic asymmetric dihydroxylation of alkenes

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    Asymmetric dihydroxylation induced by Insoluble Polymer-Bound (IPB approach) Cinchona alkaloid derivatives is reviewed. Reactivities and enantioselectivities comparable to those achieved with the soluble counterparts are obtained with polymers having structural properties compatible with the reaction conditions. By using a highly efficient polymer, olefins with different structures can be dihydroxylated at a synthetically useful level of enantioselectivity. Handling and recovery of the catalyst is very easy; recycling is performed with a small amount of metal
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