1: iPr2NEt / CH2Cl2 / 0 °C 2: 94 percent / n-Bu4NF / tetrahydrofuran / 3 h / 23 °C View Scheme

benzotriazol-1-ol; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine in diethylene glycol dimethyl ether T=100°C; 0.5 h; microwave irradiation;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3587190', constants.ctx, '0')">hydroxylamine</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3587155', constants.ctx, '0')">water</a> <br />24&nbsp;h;&nbsp;&nbsp;Heating;&nbsp;<br /> &nbsp;