1.1: butan-1-ol; water / 60 °C 2.1: hydrogen / platinum on activated charcoal / butan-1-ol; water / 16 h / 50 °C 3.1: sodium hydroxide / toluene; water / 0.08 - 0.17 h / 0 - 5 °C 3.2: 0.92 h / 0 - 5 °C 4.1: formic acid / 4 h / 20 °C View Scheme
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