1: 85 percent / SOCl2, N,N-dimethylaniline / benzene / 1 h / Heating 2: 81 percent / KI / acetone / 20 h / Heating 3: 82 percent / aq. H2SO4 / acetic acid / 1 h / Heating 4: conc. HCl, Zn / acetic acid; H2O / 5 h / 5 °C View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 77 percent / N-bromosuccinimide / CCl₄ / 3 h / Heating; Irradiation<br />2: 86.6 percent / K₂CO₃ / methanol / 5 h / Heating<br /> <br /> &nbsp;