1.) acetonitrile, 35 min, reflux, 2.) 15 min, reflux; Yield given. Multistep reaction;

1: 2.6 g / CHCl3; ethanol / 2.5 h / Heating 2: 1.) sodium nitrite, 50percent aq. tetrafluoroboric acid / 1.) water, 2.) irradiation, 72 h View Scheme

in ethanol; chloroform 2.5 h; Heating;

Stage #1: <a href="#" onclick="return RXDsubstances(event, this, '774783', constants.ctx, '0')">ethyl (hydroxylimino)cyanoacetate</a> <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, '11465123', constants.ctx, '0')">platinum on activated charcoal</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a> <br />T=20&deg;C;&nbsp;P=3051.17&nbsp;Torr;&nbsp;72&nbsp;h;&nbsp;<br />Stage #2: <a href="#" onclick="return RXDsubstances(event, this, '385686', constants.ctx, '0')">oxalic acid</a> &nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a> <br />T=5&deg;C;&nbsp;<br /> &nbsp;