hydrogenchloride in dichloromethane 2 h; Heating;

1: 81 percent / TiCl4 / benzene; pentane / 1) 1 h, ice-bath, 2) 1.5 h, rt 2: 1) LDA / 1) THF, hexane, 20 min, 0 deg C, 2) 0 deg C, 1 h; then rt, 2 h 3: 79 percent / aq. 2N HCl / CH2Cl2 / 2 h / Heating View Scheme

1: 1) LDA / 1) THF, hexane, 20 min, 0 deg C, 2) 0 deg C, 1 h; then rt, 2 h 2: 79 percent / aq. 2N HCl / CH2Cl2 / 2 h / Heating View Scheme

hydrogenchloride; diethyl ether