1: pyridine / 12 h 2: 89 percent / 0.2M-NaOH / 6 h / Ambient temperature View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1732799', constants.ctx, '0')">carbon tetrabromide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '610776', constants.ctx, '0')">triphenylphosphine</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1730800', constants.ctx, '0')">dichloromethane</a> <br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 65 percent / diethyl azodicarboxylate / tetrahydrofuran / Ambient temperature<br />2: 73 percent / acetyl bromide / tetrahydrofuran / 3 h / Ambient temperature<br /> <br /> &nbsp;