1: With platinum(IV) oxide; hydrogen in ethanol; water T=20°C; 12 h; 2: With potassium hydroxide in water 4 h;

1.1: trimethylsilyl trifluoromethanesulfonate / dichloromethane / 20 °C / |Inert atmosphere 2.1: pyridine / dichloromethane / 36 h / 20 °C / |Inert atmosphere 3.1: platinum(IV) oxide; hydrogen / water; ethanol / 12 h / 20 °C 3.2: 4 h View Scheme

1.1: pyridine / dichloromethane / 36 h / 20 °C / |Inert atmosphere 2.1: platinum(IV) oxide; hydrogen / water; ethanol / 12 h / 20 °C 2.2: 4 h View Scheme