1.1: sodium hydroxide / water / 1 h / 20 °C 1.2: polyethylene glycol / 15 h / 110 °C 2.1: potassium hydroxide / water / 4 h / 110 °C 2.2: 1 h / 20 °C View Scheme
1.1: sodium hydroxide / water / 1 h / 20 °C 1.2: polyethylene glycol / 15 h / 110 °C 2.1: potassium hydroxide / water / 4 h / 110 °C 2.2: 1 h / 20 °C View Scheme