1: N,N-dimethyl-formamide With bis(trichloromethyl) carbonate in 1,2-dichloro-ethane T=0 - 20°C; 2: 3',5'-dibromo-2'-hydroxyacetophenone in 1,2-dichloro-ethane T=0 - 20°C; 4.5 h; Further stages.;

trichlorophosphate 24 h; Ambient temperature;