1: potassium carbonate / cyclohexanone / 6 h / Heating 2: 11.2 g / potassium hydroxide / ethanol; H2O / 6 h / Heating 3: 8.5 g / concentrated hydrochloric acid / H2O / 12 h / Ambient temperature 4: 1.4 g / hydrogen / Pd-5percent on charcoal / various solvent(s) / 760 Torr / Ambient temperature View Scheme