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PPA

1: With sulfuric acid 14 h; Reflux; 2: With sodium hydrogencarbonate in water

sulfuric acid in methanol

hydrogen bromide; sodium nitrite in water; acetonitrile T=20°C; 6 h;

Stage #1: <b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '11342938', constants.ctx, '0')">lithium hydroxide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3587155', constants.ctx, '0')">water</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102551', constants.ctx, '0')">1,4-dioxane</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '1098229', constants.ctx, '0')">methanol</a> <br />T=70&deg;C;&nbsp;4&nbsp;h;&nbsp;<br />Stage #2: <b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1098214', constants.ctx, '0')">hydrogenchloride</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102551', constants.ctx, '0')">1,4-dioxane</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '1098229', constants.ctx, '0')">methanol</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3587155', constants.ctx, '0')">water</a> <br />pH=3;&nbsp;<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: Acidic conditions; Heating<br />2: piperidine / pyridine / 70 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: lithium hexamethyldisilazane / tetrahydrofuran / -10 &deg;C<br />2: Acidic conditions; Heating<br />3: piperidine / pyridine / 70 &deg;C<br /> <br /> &nbsp;

Stage #1: <b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102438', constants.ctx, '0')">piperidine</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '103233', constants.ctx, '0')">pyridine</a> <br />T=20 - 80&deg;C;&nbsp;Doebner reaction;&nbsp;6&nbsp;h;&nbsp;<br />Stage #2: <b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1098214', constants.ctx, '0')">hydrogenchloride</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3587155', constants.ctx, '0')">water</a> <br />&nbsp;Cooling with ice;&nbsp;<br /> <br /> &nbsp;