PPA in water; acetone T=50°C; 20 h; Yield given. Yields of byproduct given;

1: 80 percent / pyridine / 50 h / 25 °C 2: polyphosphoric acid / acetone / 22 h / 55 - 60 °C View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3587189', constants.ctx, '0')">hydrogen</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '14605344', constants.ctx, '0')">Ra-Ni</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a> <br />4&nbsp;h;&nbsp;&nbsp;Ambient temperature;&nbsp;&nbsp;Yield given;&nbsp;<br /> &nbsp;