ammonia in methanol T=4°C; 24 h;

1: 1.) hexamethyldisilazane, ammonium sulfate, 2.) Me3SiCl, CF3SO3Cl / 1.) acetonitrile, reflux, 2.) acetonitrile, reflux, 3 h 2: 82 percent / NH3 / methanol / 24 h / 4 °C View Scheme