1: 52 percent / 47percent HBr / 24 h / Heating 2: 85 percent / tetrahydrofuran / 0.25 h / 0 - 5 °C 3: Ag2O / H2O / 0.75 h / 5 - 10 °C 4: 6 percent / phenothiazine / H2O; benzene / 1 h / Heating View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '11342940', constants.ctx, '0')">sodium hydroxide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '8594215', constants.ctx, '0')">potassium hexacyanoferrate(III)</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3587155', constants.ctx, '0')">water</a> <br />T=80 - 90&deg;C;&nbsp;4&nbsp;h;&nbsp;<br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 65 percent / P₂S₅ / benzene / 4 h / Heating<br />2: 55 percent / 15percent NaOH, K₃Fe(CN)6 / H₂O; ethanol / 4 h / 80 - 90 &deg;C<br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3902898', constants.ctx, '0')">hydrogen cation</a>&nbsp;<b>in</b>&nbsp; various solvent(s)<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 66 percent / benzene; pyridine / 3 h / Ambient temperature<br />2: 65 percent / P₂S₅ / benzene / 4 h / Heating<br />3: 55 percent / 15percent NaOH, K₃Fe(CN)6 / H₂O; ethanol / 4 h / 80 - 90 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 66 percent / benzene; pyridine / 3 h / Ambient temperature<br />2: 65 percent / P₂S₅ / benzene / 4 h / Heating<br />3: 55 percent / 15percent NaOH, K₃Fe(CN)6 / H₂O; ethanol / 4 h / 80 - 90 &deg;C<br /> <br /> &nbsp;