1: With triethylaluminum in toluene T=0°C; 0.0833333 h; 2: With diisobutylaluminium azide in toluene T=100°C;

1: With ethanol; sulfuric acid; water T=45°C; 3.5 h; 2: With sodium hydroxide in water pH=2 - 3;

sodium carbonate; (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride in ethylene glycol dimethyl ether; water T=115°C; Suzuki-Miyaura reaction; 0.5 h; microwave iradiation;

1: 1-Bromo(1H-tetrazol-5-yl)benzene With zinc trifluoromethanesulfonate in acetonitrile 24 h; Heating; 2: [4-(hydroxymethyl)-phenyl]-boronic acid With sodium carbonate; (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride in ethylene glycol dimethyl ether; water Suzuki reaction; 24 h; Heatingsolid phase synthesis; 3: With trifluoroacetic acid in dichloromethane 4 h; Further stages.;