1: ethyl-α,α,α-trifluoroacetate With hydrazine hydrate in methanol; ethanol T=0 - 20°C; 2: methanimidamide monoacetate in methanol; ethanol T=80°C; 2.5 h;

1: in ethanol T=20°C; 0.5 h; 2: With acetic acid T=100°C; 5 h;