1: 2) AcOH / 1) MeOH, 2h, reflux 2) DMF, 2h, reflux 2: 92 percent / Ag2CO3 / CHCl3 3: 85 percent / 5percent HCl / acetone / Heating View Scheme

Multi-step reaction with 2 steps 1: 2) AcOH / 1) MeOH, 2h, reflux 2) DMF, 2h, reflux2: 92 percent / Ag2CO3 / CHCl3