triphenylphosphine in chloroform a) -50 deg C, 15 min, b) to 20 deg C;

<b>Multi-step reaction with 2 steps<br /> </b>1: 92 percent / tetraphenylporphine, O₂ / CCl₄ / 50 h / 0 &deg;C / Irradiation<br />2: 61 percent / conc. H₂SO₄ / CHCl₃ / 48 h / Ambient temperature<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 1O₂ / Irradiation<br />2: 61 percent / H₂SO₄ / CHCl₃ / 0 &deg;C<br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '19292276', constants.ctx, '0')">tetraphenyl phosphine</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '2037554', constants.ctx, '0')">sulfuric acid</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3587218', constants.ctx, '0')">oxygen</a> <br />&nbsp;1) chloroform, -5 degC to 0 degC, irradiation;&nbsp;&nbsp;Yield given. Multistep reaction;&nbsp;<br /> &nbsp;