potassium hydroxide in ethanol; water 5 h; Reflux;

<b>Multi-step reaction with 3 steps<br /> </b>1: 1H-imidazole / N,N-dimethyl-formamide<br />2: N-bromosuccinmide; 2,2'-azo-bisisobutyronitrile / tetrachloromethane / 5 h / Reflux<br />3: water; dimethyl sulfoxide / 20 &deg;C<br /> <br /> &nbsp;