sodium dichromate; sulfuric acid in diethyl ether; water T=23°C; 5 h;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '2095855', constants.ctx, '0')">4,4'-di-tert-butylbiphenyl</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3924730', constants.ctx, '0')">lithium</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102391', constants.ctx, '0')">tetrahydrofuran</a> <br />T=-78&deg;C;&nbsp;1&nbsp;h;&nbsp;<br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: NaH / benzene<br />2: MeLi / tetrahydrofuran<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 73 percent / ZnBr₂ / CH₂Cl₂ / 48 h / Ambient temperature<br />2: Ra-Ni / ethanol / 70 deg C, 4 h, rt, 20 h<br /> <br /> &nbsp;