1: tert-butyl 2-(1-vinylcyclohexyl)hydrazinecarboxylate With hydrogenchloride in dioxanes 24 h; Inert atmosphere; 2: With platinum(IV) oxide; hydrogen in methanol 48 h; 3: acetyl chloride With 4-(N,N-dimethlyamino)pyridine; triethylamine Inert atmosphere;