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Catalytic Enantioselective Entry to Triflones Featuring a Quaternary Stereocenter.

Francesca FrancoSara MeninnoJacob OvergaardSergio RossiMaurizio BenagliaAlessandra Lattanzi
Published in: Organic letters (2022)
A highly enantioselective one-pot synthesis of functionalized triflones, bearing a quaternary stereocenter, has been developed, exploiting the Michael reaction of α-(trifluoromethylsulfonyl) aryl acetic acid esters with N -acryloyl-1 H -pyrazole catalyzed by commercially available Takemoto's catalyst, followed by nucleophilic acyl substitution with alcohols. Preliminary investigations highlighted the attractive potential of the triflinate anion as the leaving group for stereocontrolled postfunctionalizations.
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