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- W609085851 abstract "A novel 1,2-diamine monomer was successfully synthesized by Williamson reaction of N-Boc protected 1,2-diphenylethylenediamine bearing two phenolic hydroxy groups with 4-bromobutylstyrene. Copolymerization of the resulting monomer with styrene in DMF at 70°C for 24 h, followed by treatment with HCl in THF, gave the polymer-supported 1,2-diamine. The polymeric chiral complex was prepared by treatment with RuCl2-[(S)-BINAP] and used for the asymmetric hydrogenation of aromatic ketones. The corresponding chiral alcohols were obtained in quantitative yields with high levels of enantioselectivity. The crosslinked polymeric chiral catalyst used in the asymmetric hydrogenation was easily separated from the reaction mixture. The recovered catalyst was used three times without loss of enantioselectivity." @default.
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- W609085851 date "2006-01-01" @default.
- W609085851 modified "2023-10-16" @default.
- W609085851 title "Synthesis of Polymer-supported 1,2-Diamine and Its Application to Asymmetric Hydrogenation of Aromatic Ketones" @default.
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- W609085851 doi "https://doi.org/10.1295/koron.63.341" @default.
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