[EN] CYCLOALKYLNORBORNENE MONOMERS, POLYMERS DERIVED THEREFROM AND THEIR USE IN PERVAPORATION [FR] MONOMÈRES DE CYCLOALKYLNORBORNÈNE, POLYMÈRES ISSUS DE CEUX-CI ET LEUR UTILISATION EN PERVAPORATION
successfully employed for the Ni-catalyzed asymmetric hydrovinylation reaction. Diarylphosphinites, carrying β-acylamino groups prepared from readily available carbohydrates, in conjunction with highly dissociated counteranions [(3,5-(CF3)2C6H3]4B− or SbF6−}, effect the hydrovinylation of vinylarenes under ambient pressure of ethylene with high enantioselectivity. Nitrogen substituents such as –COCF3 and COPh
Hydrovinylation of Norbornene. Ligand-Dependent Selectivity and Asymmetric Variations
作者:Ramaiah Kumareswaran、Malay Nandi、T. V. RajanBabu
DOI:10.1021/ol0356284
日期:2003.11.1
Norbornene undergoes Ni-catalyzed (1-2 mol% allylnickel bromide/phosphine/NaBARF or AgSbF6, 1 bar ethylene, -50 degreesC) hydrovinylation (>97% yield), giving either a 1:1 or a 2:1 (norbornene/ethylene) adduct depending on the size of the phosphine. Use of binaphthol-derived phosphoramidite ligand results in up to 80% ee for the 1:1 adduct. The course of the reaction is highly dependent on the ligand (size and configuration of the appendages) and the counteranion present.
[EN] CYCLOALKYLNORBORNENE MONOMERS, POLYMERS DERIVED THEREFROM AND THEIR USE IN PERVAPORATION<br/>[FR] MONOMÈRES DE CYCLOALKYLNORBORNÈNE, POLYMÈRES ISSUS DE CEUX-CI ET LEUR UTILISATION EN PERVAPORATION
申请人:PROMERUS LLC
公开号:WO2014025735A1
公开(公告)日:2014-02-13
Embodiments in accordance with the present invention provide forming various polycycloalkyl polynorbornene polymers and copolymers which are useful for forming pervaporation membranes, the membranes themselves and methods of making such membranes.
Racemic Grignard reagents, 2-phenylpropylmagnesium chloride and 2-norbornylmagnesium chloride were kinetically resolved by asymmetriccross-coupling with vinyl bromides in the presence of chiral phosphine-nickel catalysts to give optically active coupling products (~37% ee) and carboxylic acids after carbonation with carbon dioxide.