4.8 Article

Chiral Phosphoric Acid Catalyzed Intramolecular Dearomative Michael Addition of Indoles to Enones

Journal

ORGANIC LETTERS
Volume 19, Issue 4, Pages 762-765

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.6b03610

Keywords

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Funding

  1. National Basic Research Program of China from MOST [2016YFA0202900, 2015CB856600]
  2. National Natural Science Foundation of China [21272253, 21332009, 21421091]

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An enantioselective intramcilecular dearomative Michael addition of indolyl enones is presented. In the presence of catalytic amount of chiral phosphoric acid, various enantioenriched spiro-indolenines bearing a quaternary stereo genic center were obtained with good yields and enantioselectivity (up to 97% ee) under mild reaction conditions.

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