1: H2SO4, H2O / 2 h / 80 - 85 °C 2: 65 percent / K2CO3 / tetrahydrofuran; H2O / 2 h / Ambient temperature View Scheme

sulfuric acid; water T=80 - 85°C; 2 h; Yield given;

<b>Multi-step reaction with 2 steps<br /> </b>1: 95.1 percent / NaOMe / methanol; 1,2-dichloro-ethane / 1 h / Ambient temperature<br />2: 40.6 g / DCC, NEt₃ / CH₂Cl₂ / Ambient temperature<br /> <br /> &nbsp;