Hydrolysis of Mixed 0,s-Ortho Esters of p -Methoxybenzoic Acid. Reactivity and Partitioning of the Tetrahedral Intermediates ... Tadashi Okuyama,* Masakazu Kitano, and Takayuki Fueno ... Faculty of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan Received December 4, 1986 ... Hydrolyses of four ortho esters of p-methoxybenzoic acid, ArC(OMe),,(SMe ), (n = 0-3), have been examined at 30 "C in aqueous solution. All the hydrolyses are ...