sodium hydroxide; tetra(n-butyl)ammonium hydrogensulfate; potassium carbonate in toluene T=18 - 20°C; 2 h;

1: N-(2-benzoyl-4-chlorophenyl)acetamide With sodium hydride in N,N-dimethyl-formamide T=1 - 20°C; Inert atmosphere; 2: methyl iodide in N,N-dimethyl-formamide 5 h; Inert atmosphere;

sulfuric acid in ethanol Heating;