Pd/C-catalyzed cyclization/isomerization: A new route to 2-aroyl-3-vinyl benzo[b]furans via carbon–carbon bond formation

Figure optionsDownload full-size imageDownload as PowerPoint slideA variety of 2-aroyl(acyl, or carboxyl)-3-vinyl benzo[b]furans have been prepared via C–C bond formation in good to excellent yields by Pd/C-catalyzed cyclization/isomerization of propargylic compounds. The reaction proceeded with easily accessible starting materials and inexpensive catalyst under mild conditions. Furthermore, a number of benzo[b]furan derivatives including an allene functional group have been prepared too.