Palladium-Catalyzed C2-Selective Oxidative Olefination of Benzo[ b ]thiophene 1,1-Dioxides with Styrenes and Acrylates.

Here, we disclose a novel Pd(II)-catalyzed oxidative Heck reaction of benzo[ b ]thiophene 1,1-dioxides with styrenes and acrylates. This transformation features broad functional group tolerance and high C2 selectivity. Furthermore, the photoluminescence properties of C-2 alkenylated products have been characterized, which illustrates the potential usefulness of our protocol in constructing π-conjugated fluorescent molecules.