1: 3,3-dibromo-1,1,1-trifluoropropanone With sodium acetate Hydrolysis; 0.5 h; Heating; 2: 4-methyl-benzaldehyde With ammonium hydroxide in methanol T=20°C; cyclocondensation; 20 h;

ammonium acetate in acetic acid T=80°C; 18 h;