1: 65 percent / K2CO3 / 18-crown-6 / acetone 2: 86 percent / LiAlH4 / diethyl ether 3: 98 percent / triton B / 18 h / 20 °C 4: 69 percent / pyridine / 6 h / Heating 5: 30 percent / cc. HCl / methanol / 6 h / Heating 6: 13 percent / toluene-p-sulphonic acid / CH2Cl2 / 2.75 h / Heating View Scheme

toluene-4-sulfonic acid in dichloromethane 2.75 h; Heating;

1: 98 percent / triton B / 18 h / 20 °C 2: 69 percent / pyridine / 6 h / Heating 3: 30 percent / cc. HCl / methanol / 6 h / Heating 4: 13 percent / toluene-p-sulphonic acid / CH2Cl2 / 2.75 h / Heating View Scheme