1: 1-(2,5-dichlorophenyl)-2-(1,2,4-1H-triazol-1-yl)ethanone With bromine; sodium acetate; acetic acid 3 h; 2: thiourea in ethanol 8 h; Heating;

1.1: Br2; acetic acid 2.1: anhydrous potassium carbonate / CHCl3 / Heating 3.1: Br2; sodium acetate; acetic acid / 3 h 3.2: 48.3 percent / ethanol / 8 h / Heating View Scheme

1.1: anhydrous potassium carbonate / CHCl3 / Heating 2.1: Br2; sodium acetate; acetic acid / 3 h 2.2: 48.3 percent / ethanol / 8 h / Heating View Scheme