In this paper we report the preparation of catalytic polymeric membranes having the complex [(N,N_-bis(3-tert-butyl-5-(heptadecafluorooctyl)salicylidene)-trans-1,2-cyclohexanediamine)Co] embedded into Hyflon AD60X, PES and PSf and their use in the cyclopropanation reaction of olefins with ethyl diazoacetate (EDA). A study of the reaction in the homogeneous phase was also performed. The kinetics of the cyclopropanation reaction is first-order in the diazoacetate and the catalyst and zero order in the olefin, but we observed a more complex dependence on the additive, NMI (N-methylimidazole). The positive effect of the additive is completely reversed at NMI concentration higher than 6•10−2 M.

From homogeneously to heterogeneously catalyzed cyclopropanation reactions: New polymeric membranes embedding cobalt chiral Schiff base complexes

GOLEMME, Giovanni;
2010

Abstract

In this paper we report the preparation of catalytic polymeric membranes having the complex [(N,N_-bis(3-tert-butyl-5-(heptadecafluorooctyl)salicylidene)-trans-1,2-cyclohexanediamine)Co] embedded into Hyflon AD60X, PES and PSf and their use in the cyclopropanation reaction of olefins with ethyl diazoacetate (EDA). A study of the reaction in the homogeneous phase was also performed. The kinetics of the cyclopropanation reaction is first-order in the diazoacetate and the catalyst and zero order in the olefin, but we observed a more complex dependence on the additive, NMI (N-methylimidazole). The positive effect of the additive is completely reversed at NMI concentration higher than 6•10−2 M.
Cobalt Schiff bases; Catalytic Membranes; Cyclopropanation reactions
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/156419
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