1: 2-methoxy-phenylamine; dimethyl acetylenedicarboxylate in methanol T=3 - 20°C; 2: With Eaton's reagent T=49 - 53°C; 5 - 7.5 h; 3: methyl iodide With potassium carbonate in N,N-dimethyl-formamide T=37°C; 1 h;