Acid-mediated highly regioselective oxidation of substituted furans: A simple and direct entry to substituted butenolides

1. Ceñal, J.P.
2. Carreras, C.R.
3. Tonn, C.E.
4. Padrón, J.I.
5. Ramírez, M.A.
6. Díaz, D.D.
7. García-Tellado, F.
8. Martín, V.S.