Stereocontrolled Synthesis of Spirooxindoles through Lewis Acid-Promoted [5 + 2]-Annulation of Chiral Silyl Alcohols
摘要:
The enantioselective synthesis of stereochemically and structurally diverse spirocyclic oxindoles by [5 + 2]-annulation of chiral crotylsilanes bearing a primary alcohol is described. The annulation products were further elaborated to polycyclic oxindoles by Pd(0) catalysis.