Add time:08/29/2019         Source:sciencedirect.com

The cinchonine-catalyzed in situ generation of unstable and gaseous trifluoroacetaldehyde from its hemiacetal and successive direct aldol reaction with 2-methoxy-1-phenylethanone proceeded smoothly to give 4,4,4-trifluoro-3-hydroxy-2-methoxy-1-phenylbutan-1-one in good yield with low diastereoselectivity and enantioselectivity.

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