1: 42 percent / dimethylformamide / Ambient temperature 2: 48 percent / K2CO3 / dimethylformamide / 30 h 3: 70 percent / HCl / 1 h / Heating 5: 52 percent / 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) / toluene / 14 h / Heating View Scheme

<b>Multi-step reaction with 4 steps<br /> </b>1: 70 percent / 1,2-dichloro-benzene / 4 h / Heating<br />2: 87 percent / NaOMe / methanol / 2 h<br />3: 89 percent / POCl₃ / 2 h / Heating<br />4: 73 percent / N-bromosuccinimide, benzoyl peroxide / CCl₄ / 36 h / Heating<br /> <br /> &nbsp;