Benzyl Bromide → 4-(4-Benzyloxymethylimidazol-1-ylmethyl)benzoic acid

Participants

Reaction Steps

To a solution of 4-(4-hydroxymethylimidazol-1-yl-methyl)benzoic acid methyl ester of Example A1 (0.4 g, 1.6 mmol) in THF/DMF (6/4) was added portionwise NaH 60% (162 mg, 4 mmol). The reaction mixture was stirred at room temperature for 1.5 h, then benzyl bromide (328 mg, 1.92 mmol) was added and the reaction was stirred overnight. The solvent was removed under reduced pressure, then water (10 ml) was added and the mixture was extracted with CH2Cl2. The aqueous phase was acidified with HCl 1 N to pH=4 and extracted with CH2Cl2. The latest organic phase was dried over MgSO4 and concentrated under vacuum. The crude product was purified by flash chromatography on silica gel (CH2Cl2/MeOH: 95/05) to give a white solid (17 mg).

Provenance & Evidence