water; cesium fluoride in tetrahydrofuran T=65°C; 2 h;

<b>Multi-step reaction with 3 steps<br /> </b>1: 85 percent / n-BuLi / diethyl ether / 1.5 h / -78 &deg;C<br />2: 1.) DIBAL-H, 2.) N-bromosuccimide / 1.) hexane, RT, 20 h, 2.) hexane, from -20 deg C to RT, 3 h<br />3: 1.) n-BuLi / 1.) diethyl ether, reflux, 2 h, 2.) diethyl ether, from 0 deg C to RT<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 1.) DIBAL-H, 2.) N-bromosuccimide / 1.) hexane, RT, 20 h, 2.) hexane, from -20 deg C to RT, 3 h<br />2: 1.) n-BuLi / 1.) diethyl ether, reflux, 2 h, 2.) diethyl ether, from 0 deg C to RT<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: n-butyllithium<br />2: dihydrogen peroxide / |Inert atmosphere<br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1209227', constants.ctx, '0')">n-butyllithium</a> <br />&nbsp;1.) diethyl ether, reflux, 2 h, 2.) diethyl ether, from 0 deg C to RT;&nbsp;&nbsp;Yield given. Multistep reaction;&nbsp;<br /> &nbsp;