1: 1-((2'-cyanobiphenyl-4-yl)methyl)-4-methyl-2-propyl-1H-benzo[d]imidazole-6-carboxylic acid With thionyl chloride; N,N-dimethyl-formamide in dichloromethane T=0°C; Reflux; 2: N-methyl-1,2-phenylenediamine dihydrochloride With sodium carbonate; sodium chloride in water; ethyl acetate T=-20 - 5°C; 1 h; 3: With boric acid in toluene T=10 - 15°C; Reflux; Product distribution / selectivity;