• Title/Summary/Keyword: Chiral phase-transfer catalysts

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Highly efficient ortho-fluoro-dimeric cinchona-derived phase-transfer catalysts

  • Park, Hyeung-Geun;Jeong, Byeong-Seon;Lee, Jeong-Hee;Yoo, Mi-Sook;Jew, Sang-Sup
    • Proceedings of the PSK Conference
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    • 2003.04a
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    • pp.250.3-251
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    • 2003

  • A series of cinchona alkaloid-derived dimeric quaternary ammonium salts were prepared as chiral phase-transfer catalysts by the introduction of various functional groups on the phenyl ligand. Among them. the 2-F-substituted derivative 21 showed the highest enantioselectivity in the alkylation of the glycine anion equivalent 1 (97->99 ％ ee).

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