catalytic stereoselective conjugate addition of oxindole to electron-deficient alkynes
a z/e-selective and enantioselective conjugate addition of oxindoles to butyl but-2-ynedioate derivatives has been developed, providing a facile access to enantioenriched multifunctional olefins, which can be further converted into 3,3a- dihydro-2h-pyrrolo[3,4-c]quinoline-1,4(5h,9bh)-dione derivatives via conventional operations.
