2-Methylbenzimidazole → 1-(3-Bromobenzyl)-2-methylbenzimidazole

Beteiligte Stoffe

Reaktionsschritte

First 1.23 g (11 mmol) of potassium-tert-butoxide and after 45 minutes 2.62 g (10.5 mmol) of 3-bromo-benzylbromide are added to a solution of 1.32 g (10 mmol) of 2-methyl-benzimidazole in 10 ml of absolute dimethylsulphoxide and the reaction mixture is stirred for 4 hours. The mixture is then diluted with ethyl acetate, washed 3× with 14% NaCl solution, dried, concentrated and purified by flash chromatography (silica gel; petroleum ether/ethyl acetate=9:1 to ethyl acetate).

Herkunft & Nachweise