Rigid cinchona conformers in enantioselective catalytic reactions: New cinchona-modified platinum catalysts in the Orito reaction
作者： Mihály Bartók , Károly Felföldi , György Szöllösi , Tibor Bartók
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摘要: The use of cinchona alkaloids (cinchonidine, cinchonine, quinine, quinidine, α-isocinchonine, α-isoquinidine, γ-isoquinidine) in the Orito reaction (hydrogenation ethyl pyruvate and benzoylformate) strongly supports structure intermediate complex (cinchona alkaloid “anti‐open” conformer–pyruvate 1 : complex); addition, so far unknown stereochemical conditions have been identified utilization rigid conformers study asymmetric syntheses generalized.
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