1: (Ethoxycarbonylmethyl)dimethyl-sulfonium bromide With caesium carbonate in anhydrous xylene T=20°C; 2: C14H13BrClNO2S in anhydrous xylene T=20°C; 3: With potassium tert-butylate in anhydrous xylene T=20°C; 72 h;

1: 2-(dimethyl-λ4-sulfanylidene)-1-phenyl-ethanone With caesium carbonate in anhydrous xylene T=20°C; 0.5 h; 2: C14H13BrClNO2S in anhydrous xylene T=20°C;