hydrogenchloride; acetic acid 1) petroleum ether; 2) methylene dichloride, methanol, 1 h; Multistep reaction. Title compound not separated from byproducts;

1: 1) NaH / 1) DMF, -15 grad C, 1 h; 2) 2 h, room temp. 2: 0.78 g / p-TsOH / CH2Cl2 / 2 h View Scheme

Multi-step reaction with 2 steps 1: 1) NaH / 1) DMF, -15 grad C, 1 h; 2) 2 h, room temp.2: 58 percent / p-TsOH / CH2Cl2 / 2 h