Enantioselective BIMP-catalysed 2,3-Wittig Rearrangements of Oxindole-Derived Allylic and Propargylic Ethers

Key Points

• This research investigates the use of organocatalytic methods to achieve enantioselective rearrangements of oxindole-derived ethers.
• Utilized bifunctional iminophosphorane (BIMP) as organocatalysts.
• Conducted [2,3]-Wittig rearrangements on various allylic and propargylic ethers.
• Analyzed the stereochemical outcomes of the reactions.
• Achieved high stereoselectivity in the synthesis of 3-hydroxyoxindole derivatives.
• Generated a range of oxindole derivatives through the proposed methodology.