1.1: Et3N / 6 h / cooling 2.1: KOH / ethanol; H2O / 4 h / Heating 2.2: KOH / ethanol; H2O / 5 h / Heating View Scheme

1: With potassium hydroxide in ethanol; water 4 h; Heating; 2: With potassium hydroxide in ethanol; water 5 h; Heating;