1: cyclohexanol, 2,2,6,6-tetramethyl With potassium hydride in tetrahydrofuran T=25°C; 1 h; 2: allyl bromide in tetrahydrofuran; dimethyl sulfoxide T=0°C; 1 h;

3-chloro-benzenecarboperoxoic acid in dichloromethane T=0 - 25°C;

1: 78 percent / 3-chloroperbenzoic acid / CH2Cl2 / 0 - 25 °C 2: 86 percent / CuI / tetrahydrofuran / 0 - 25 °C 3: 88 percent / pyridinium chlorochromate / CH2Cl2 / 0.5 h / 25 °C View Scheme

1: 78 percent / 3-chloroperbenzoic acid / CH2Cl2 / 0 - 25 °C 2: 86 percent / CuI / tetrahydrofuran / 0 - 25 °C View Scheme