1: 65 percent / sulfuryl chloride, cyclohexene / CH2Cl2 / 0.5 h / 0 °C 2: 78 percent / silica gel / pentane; diethyl ether 3: 79 percent / tetrahydrofuran / -78 - 0 °C 4: 85 percent / sodium hydride / tetrahydrofuran / 3 h / Heating View Scheme

1: 65 percent / sulfuryl chloride, cyclohexene / CH2Cl2 / 0.5 h / 0 °C 2: 78 percent / silica gel / pentane; diethyl ether 3: 59 percent / toluene; tetrahydrofuran / -78 - 0 °C View Scheme