1: 8.93 g / p-toluenesulfonic acid, H2O / acetone / 1 h / Ambient temperature 2: diethyl ether / 0.5 h / 0 °C View Scheme

1: 8.93 g / p-toluenesulfonic acid, H2O / acetone / 1 h / Ambient temperature 2: diethyl ether / 0.5 h / 0 °C 3: 4.7 g / pyridinium chlorochromate / CH2Cl2 / 2 h / Ambient temperature View Scheme

(hydrolysis);