1: 17 percent / trimethylsilyl triflate / acetonitrile / 2 h / -30 °C 2: 70 percent / CH3NH2 / ethanol / 2 h / Heating 3: 39 percent / methanol; H2O / Ambient temperature View Scheme

1: 70 percent / CH3NH2 / ethanol / 2 h / Heating 2: 39 percent / methanol; H2O / Ambient temperature View Scheme

in methanol; water Ambient temperature;