Highly regioselective synthesis of 3-alkenyl-oxindole ring-fused 3,3'-disubstituted oxindoles via direct gamma-substitution of Morita-Baylis-Hillman carbonates of isatins with 3-substituted oxindoles.

Highly regioselective synthesis of 3-alkenyl-oxindole ring-fused 3,3'-disubstituted oxindoles via direct gamma-substitution of Morita-Baylis-Hillman carbonates of isatins with 3-substituted oxindoles.