1: 56 percent / diethylaminosulfur trifluoride, 4-(dimethylamino)pyridine / CH2Cl2 / 1) -20 deg C, 15 min, 2) RT, 24 h 2: 78 percent / 1M NaOMe in MeOH / 18 h / Ambient temperature 3: H2O, Dowex 50W-X8<H(1+)> / 25 h / Heating View Scheme

1: 78 percent / 1M NaOMe in MeOH / 18 h / Ambient temperature 2: H2O, Dowex 50W-X8<H(1+)> / 25 h / Heating View Scheme

Dowex 50W-X8lt;H(1+)gt;; water 25 h; Heating; Title compound not separated from byproducts;