anion exchange Amberlite resin IRA-401 (OH- form) in ethanol; water

<b>Multi-step reaction with 2 steps<br /> </b>1: 91 percent / acetonitrile / 4.5 h / Heating<br />2: 71 percent / various solvent(s) / 4 h / 160 - 190 &deg;C<br /> <br /> &nbsp;