1: N,N-dimethyl-formamide With bis(trichloromethyl) carbonate in 1,2-dichloro-ethane T=0 - 20°C; 2: 4-methyl-2-hydroxyacetophenone in 1,2-dichloro-ethane T=0 - 20°C; 4.5 h; Further stages.;

in potassium hydroxide; ethanol 3 h; Heating;

1: With pyridine Knoevenagel condensation; Reflux; 2: With hydrogenchloride in water T=20°C; pH=1; 0.5 h;