1: 4,4-dimethyl-1-cyclohexanone N,N-dimethylhydrazone With n-butyllithium in tetrahydrofuran; hexane T=0°C; 1 h; 2: allyl bromide in tetrahydrofuran; hexane T=0 - 20°C; 3: With hydrogenchloride in tetrahydrofuran; hexane T=20°C; pH=2; 0.5 h; Further stages.;

potassium hydroxide; potassium tert-butylate in toluene T=60°C; 0.5 h; Yield given;

1: α,α'-azoisobutyronitrile / 12 h / 80 °C 2: CH3CO3H / toluene / 30 °C View Scheme

1: α,α'-azoisobutyronitrile / 12 h / 80 °C 2: CH3CO3H / toluene / 30 °C 3: 84 percent / KOH / toluene / 1 h / 110 °C View Scheme