N-bromosuccinmide in chloroform T=50°C;

<b>Multi-step reaction with 2 steps<br /> </b>1: ethyl acetate / 4 h / 90 &deg;C / |Microwave irradiation<br />2: toluene-4-sulfonic acid / dichloromethane / 6 h / |Reflux; |Darkness<br /> <br /> &nbsp;