1,721,077 research outputs found
Esperienze in Europa: il caso belga
No full textIl testo affronta il problema dell'adeguamento e delle progettazione delle stazioni e delle aree ferroviarie come occasioni di
riqualificazione urban
Cis Diidrossilazione Asimmetrica di Alcheni Mediante OsO4 Complessato ad Alcaloidi della Cincona Supportati su Matrici Polimeriche
No full textOsmium Tetroxide-Cinchona Alkaloid Complexes Supported on Polymeric Matrix as Heterogenized Catalysts in the Asymmetric Dihydroxylation of Alkenes
No full text
Polymer-bound chiral (Salen)Mn(III) complex as heterogeneous catalyst in rapid and clean enantioselective epoxidation of unfunctionalized olefins
No full textThe application of a new polystyrene-divinylbenzene system containing an optically active (salen)Mn(III) complex in asymmetric epoxidation of unfunctionalised olefins is reported. This system showed a remarkably high reaction speed in the conditions described. Reaction outcomes drastically varied, in terms of enantioselectivity and cis-trans isomerization extent, upon the terminal oxidant employed (mCPBANMO and MMPP). Reuse of the catalyst was extremely efficient for several cycles. Interesting values of ee were obtained for styrene (15%) and cis-β-methylstyrene (41%)
In Defence of the Catalytic Asymmetric cis Dihydroxylation of Olefins Utilizing Insoluble Polymeric Ligands
No full textIn Defense of the Catalytic Asymmetric Cis
Dihydroxylation of Olefins Utilizing Insoluble
Polymeric Ligand
Insoluble Polymer Bound (IPB) Approach to Catalytic Asymmetric Dihydroxylation of Olefins
No full textSTUDIO DI UN CASO DI ORTICARIA SOLARE DA LUCE VISIBILE
No full textA case of solar urticaria by visible light is reported. Among the other light sources employed to elicite isomorphic cutaneous responses, the authors emphasize the use of an unfocused argon laser beam for fototest studies
1ST-ORDER PHASE-TRANSITIONS, THE MAXWELL CONSTRUCTION, AND THE MOMENTUM-SPACE RENORMALIZATION-GROUP
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