1: 1-phenylbutane-1,3-dione With potassium carbonate in N,N-dimethyl-formamide T=0°C; 0.5 h; 2: carbon disulfide in N,N-dimethyl-formamide T=0°C; 1 h; 3: ethyl bromide in N,N-dimethyl-formamide T=0 - 20°C;

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