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- W2950310863 abstract "A chiral polymer ligand was synthesized by the polymerization of (S)-5,5′-dibromo-6,6′-dibutyl-2,2′-binaphthol (S-M-1) with (S)-2,2′-bishexyloxy-1,1′-binaphthyl-6,6′-boronic acid (S-M-2) via Pd-catalyzed Suzuki reaction. The application of the chiral polymer ligand to the asymmetric addition of phenylethynyl zinc to various aldehydes has been studied. The results show that the soluble chiral polybinaphthols ligand in combination with Et2Zn and Ti(OiPr)4 can exhibit excellent enantioselectivity for phenylacetylene addition to both aromatic and aliphatic aldehydes. The catalytically active center of the repeating unit S-1 used as a catalyst produced the opposite configuration of the propargylic alcohols to that of S-1, on the contrary, the chiral polymer gave the same configuration as the optically active binaphthol moiety of the polybinaphthols ligand. Moreover, the chiral polymer ligand can be easily recovered and reused without loss of catalytic activity as well as enantioselectivity." @default.
- W2950310863 created "2019-06-27" @default.
- W2950310863 creator A5021624524 @default.
- W2950310863 creator A5021801739 @default.
- W2950310863 creator A5049366773 @default.
- W2950310863 creator A5071585078 @default.
- W2950310863 creator A5079924998 @default.
- W2950310863 date "2008-03-01" @default.
- W2950310863 modified "2023-10-05" @default.
- W2950310863 title "Asymmetric addition of phenylacetylene to aldehydes catalyzed by soluble optically active polybinaphthols ligand" @default.
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- W2950310863 doi "https://doi.org/10.1016/j.tet.2007.12.058" @default.
- W2950310863 hasPublicationYear "2008" @default.
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