bromine in acetonitrile 1 h; Ambient temperature;

<b>Multi-step reaction with 4 steps<br /> </b>1: 1) t-BuOK / 1) t-BuOH, 2) t-BuOH, 1h<br />2: 90.4 percent / conc. HCl / methanol / 36 h / Heating<br />3: 85 percent / MeLi / diethyl ether / 20 h<br />4: 47 percent / t-butyl chromate / CCl₄ / 2 h / Heating<br /> <br /> &nbsp;