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- W2076759306 abstract "This article describes the syntheses and polymerizations of new chiral cinchoninyl(2-methacryloyloxyethyl) carbamate (CIMOC) from 2-methacryloyloxyethyl isocyanate (MOI) and cinchonine. Radical homopolymerizations were performed with AIBN as initiator in suitable solvent in a sealed tube at 60 °C. Number average molecular weights (Mn) of poly(CIMOC) were 2.6–11.8×103. Specific optical rotations ([α]435) of poly(CIMOC) were +84.0° to 0.72° in THF. The polymers obtained were tested for their efficiency in catalyzing the Michael addition of ethyl 1-oxo-2-indan carboxylate to methylvinyl ketones. The Michael adducts using poly(CIMOC-co-styrene) showed higher enantio excess (20%ee) compared to those obtained by using non-polymeric catalyst CIMOC (14%ee) and poly(CIMOC) (13%ee)." @default.
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- W2076759306 date "2004-03-01" @default.
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- W2076759306 title "Facile Synthesis of Polymer-Supported Cinchona Alkaloid Catalysts for Asymmetric Michael Reaction" @default.
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- W2076759306 doi "https://doi.org/10.1295/polymj.36.190" @default.
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