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Matches in SemOpenAlex for { <https://semopenalex.org/work/W2017886749> ?p ?o ?g. }

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• W2017886749 abstract "Dimeric anthracenyldimethyl-derived Cinchona ammonium salts are used as chiral organocatalysts in 1–10 mol % for the enantioselective conjugate addition of 2-alkoxycarbonyl-1-indanones to β-unsubstituted Michael acceptors. The corresponding adducts bearing a new all-carbon quaternary center were usually obtained in high yield and with up to 94% ee when using ammonium salts derived from quinidine and its pseudoenantiomer quinine as organocatalysts. These catalysts can be almost recovered quantitatively by precipitation in ether and reused." @default.
• W2017886749 created "2016-06-24" @default.
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• W2017886749 date "2009-12-01" @default.
• W2017886749 modified "2023-10-01" @default.
• W2017886749 title "Enantioselective Michael reaction of β-keto esters organocatalyzed by recoverable Cinchona-derived dimeric ammonium salts" @default.
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• W2017886749 doi "https://doi.org/10.1016/j.tetasy.2009.11.007" @default.
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