sodium peroxodisulphate; sulfuric acid; silver nitrate in water 4 h; Heating; Yield given. Yields of byproduct given. Title compound not separated from byproducts;
1: With sodium hydride in N,N-dimethyl-formamide; toluene T=80°C; 10 h; 2: With sulfuric acid in water T=110°C; 2 h; 3: With potassium carbonate in water pH=9;
1: With sodium hydride in N,N-dimethyl-formamide; toluene T=80°C; 2.5 h; 2: With sulfuric acid; water 2 h; Heating / reflux; 3: With water; potassium carbonate T=0°C; Product distribution / selectivity;
