Useful Syntheses of 2-Substituted 1,3-Benzoxathiolium Tetrafluoroborates from Carboxylic Acids, Anhydrides, Esters and Trihalomethyl Compounds - Barbero, Margherita; Cadamuro, Silvano; Degani, Iacopo; Fochi, Rita; Gatti, Antonella; Regondi, Valeria (Synthesis, 1986)