air; iodine in benzene 20 h; Irradiation1) ethanol, room temp., 2 h; 2) benzene, irradiation, 20h;

<b>Multi-step reaction with 4 steps<br /> </b>1: 70 percent / LiAlH₄ / diethyl ether / 3 h / Heating<br />2: 70 percent / PBr₃ / diethyl ether / 3 h / Heating<br />3: benzene / 5 h / Heating<br />4: 73 percent / NaOEt / ethanol / 2 h / Ambient temperature<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 70 percent / PBr₃ / diethyl ether / 3 h / Heating<br />2: benzene / 5 h / Heating<br />3: 73 percent / NaOEt / ethanol / 2 h / Ambient temperature<br /> <br /> &nbsp;