1: 67 percent / dioxane / 16 h / Ambient temperature 2: 67 percent / 4 h / 80 °C 3: 2) Dowex 1X8, chloride form / 1) methanol, 15 h, room temperature, sealed tube, 2) water View Scheme

1: 67 percent / 4 h / 80 °C 2: 2) Dowex 1X8, chloride form / 1) methanol, 15 h, room temperature, sealed tube, 2) water View Scheme

chloride form; Dowex 1X8 1) methanol, 15 h, room temperature, sealed tube, 2) water; Yield given. Multistep reaction;