potassium hydrogencarbonate 3 h; also in presence of DIPEA, car. concn. of substrates; Product distribution;

1: 5-[4'-(bromomethyl)[1,1'-biphenyl]-2-yl]-2-(triphenylmethyl)-1H-tetrazole; N-alkylation of ethyl 4-(1-hydroxy-1-methylethyl)-2-propylimidazole-5-carboxylate With tert-butylamine hydrobromide; potassium carbonate in acetone T=0 - 55°C; 32 h; 2: (5-methyl-2-oxo-1,3-dioxol-4-yl)methyl bromide With potassium carbonate; potassium iodide in acetone T=20 - 55°C; 3 h;

potassium carbonate; potassium iodide in acetone T=50 - 55°C; 3 h;

potassium iodide in acetone Ambient temperature;

in N-methyl-acetamide; water

potassium hydrogencarbonate in N,N-dimethyl-formamide 5 h;

N-bromosuccinmide in tetrachloromethane