1: sodium hydroxide / methanol / 0.5 h / 20 °C 2: palladium 10 on activated carbon; hydrogen / methanol / 2.17 h / 760.05 Torr View Scheme

1.1: sodium hydroxide / methanol / 0.5 h / 20 °C 2.1: palladium 10 on activated carbon; hydrogen / methanol / 2.17 h / 760.05 Torr 3.1: magnesium sulfate; trifluoroacetic acid / dichloromethane / 3 h / 60 °C / Sealed tube 3.2: pH 9 View Scheme

1.1: sodium hydroxide / methanol / 0.5 h / 20 °C 2.1: palladium 10 on activated carbon; hydrogen / methanol / 2.17 h / 760.05 Torr 3.1: magnesium sulfate; trifluoroacetic acid / dichloromethane / 18 h / 20 °C / Inert atmosphere 3.2: pH 9 View Scheme