Short and Practical Syntheses of (S)-(+)-3-(p-Tolylsulfinyl)furan-2(5H)-one and (S)-(+)-3-(p-Tolylsulfinyl)-5,6-dihydropyran-2-one - Cruz Cruz, David; Hernández Linares, Angélica; Yuste, Francisco; Martín, M. Rosario; García Ruano, José Luis (Synthesis, 2009)