sodium hydrogencarbonate in methanol; water 2 h; Heating;

 in  acetic acid 2 h;  Heating;   

Multi-step reaction with 3 steps 1: 70 percent / hydroxylamine / methanol; tetrahydrofuran / 7 h / Heating2: 88 percent / pyridine / tetrahydrofuran / 1.5 h / Ambient temperature3: 81 percent / acetic acid / 2 h / Heating  

Multi-step reaction with 4 steps 1: 64 percent / 18 h / 40 °C2: 70 percent / hydroxylamine / methanol; tetrahydrofuran / 7 h / Heating3: 88 percent / pyridine / tetrahydrofuran / 1.5 h / Ambient temperature4: 81 percent / acetic acid / 2 h / Heating