Palladium-Catalyzed, Enantioselective α-Arylation of α-Fluorooxindoles

Org Lett. 2017 Mar 17;19(6):1390-1393. doi: 10.1021/acs.orglett.7b00294. Epub 2017 Mar 6.

Abstract

Transition-metal-catalyzed asymmetric α-arylation of carbonyl compounds is a widely studied method for C-C bond formation. Recently, the α-arylation of α-fluoro ketones has been reported, including enantioselective α-arylation of α-fluoro ketones. However, the asymmetric α-arylation of α-fluoro carbonyl compounds in the carboxylic acid oxidation state has not been reported. We report the enantioselective α-arylation of α-fluorooxindoles with aryl triflates. The reaction occurs in high yield and with high enantioselectivity when catalyzed by a Pd-Segphos complex. This general class of product serves as an enantioenriched, nonenolizable version of α-aryl oxindoles.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Catalysis
  • Mesylates / chemistry
  • Molecular Structure
  • Oxidation-Reduction
  • Oxindoles / chemical synthesis*
  • Palladium / chemistry*
  • Stereoisomerism

Substances

  • Mesylates
  • Oxindoles
  • Palladium
  • trifluoromethanesulfonic acid