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• W2105302537 startingPage "5461" @default.
• W2105302537 abstract "Helically chiral polymers from achiral monomers containing N and P atoms have been shown to be ligands for transition metals such as Pd and Rh. The Rh complex of the phosphane-containing polyisocyanate p(18- co -17) was an active albeit hardly enantioselective catalyst in the asymmetric hydrogenation of the dehydro amino acid N -acetamidocinnamic acid (15% enantiomeric excess). The most active catalyst obtained until now was the Pd-complexed polymethacrylate Pd-p12, which catalyzes the allylic substitution reaction of 1,3-diphenylprop-2-enyl acetate with dimethyl malonate even at –20°C in quantitative yield, although again the enantioselectivity was unsatisfactory. The most successful application of a helically chiral polymer in asymmetric catalysis with respect to both reactivity and enantioselectivity is the polymethacrylate p(5- co -8). Its palladium complex catalyzes the above-mentioned reaction at 0°C with quantitative yield and 60% enantiomeric excess." @default.
• W2105302537 created "2016-06-24" @default.
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• W2105302537 date "2004-03-30" @default.
• W2105302537 modified "2023-10-11" @default.
• W2105302537 title "Helically chiral polymers: A class of ligands for asymmetric catalysis" @default.
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• W2105302537 doi "https://doi.org/10.1073/pnas.0307443101" @default.
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