Access to Enantioenriched -Hydroxy gem-Difluorinated Heterocyclic and Acyclic Derivatives through Rh(III)-Catalyzed Asymmetric Transfer Hydrogenation
ADVANCED SYNTHESIS & CATALYSIS(2024)
摘要
We report a process to access a variety of enantioenriched alpha-gem-difluorinated alcohols. A Rh(III)-catalyzed asymmetric transfer hydrogenation method was developed in 85-98% yields and enantiomeric excesses ranging from 52% to >99%. The reduction proceeds under mild conditions with a range of difluorinated molecules including 3,3-difluorochromanone, 3,3-difluorothiochromanone, 3,3-difluoro-dihydroquinolinone and alpha-difluorinated beta-ketosulfone derivatives to provide the desired enantioenriched difluorinated alcohols which are valuable fluorinated building blocks.
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关键词
Asymmetric transfer hydrogenation,Enantioselectivity,Homogeneous catalysis,Heterocycles,Transition metals
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