1: carbon disulfide; 1-phenylbutane-1,3-dione With tetrabutylammomium bromide; potassium carbonate in water T=20°C; 1 h; 2: Me-X, X = Hal in water T=20°C; 8.25 h; Further stages.;

(i) aq. NaOH, <nBu4N>HSO4, (ii) /BRN= 969135/; Multistep reaction;

sulfuric acid in dichloromethane T=0 - 20°C;

sulfuric acid in dichloromethane T=20°C; 10 h;