N-bromobutanimide → (5-bromo-1-methyl-1H-imidazol-2-yl)methanol

関与物質

反応手順

1-Methylimidazole-2-methanol (3.15 g; 28 mmol) (R. J. Sundberg; P. V. Nguyen; Med. Chem. Res. 7, 2, 1997, 123-136) was suspensed in THF (75 ml) at −20° C. and treated slowly (within 30 min) with N-bromosuccinimide (4.9 g, 27 mmol). The reaction mixture was allowed to warm up slowly to room temperature and quenched with saturated aqueous NaHCO3 solution (50 ml). The aqueous layer was extracted 3 times with AcOEt. The combined extracts were washed with saturated aqueous NaHCO3 solution, dried, over Na2SO4, filtered and the solvent was removed in vacuo. The residue was chromatographed (silica, elution first with AcOEt/hexane=1:1, then with CH2Cl2/MeOH=95:05) to provide the title compound (2.11 g, 67%) as a white solid. MS: m/e=191.2 (M+).

情報源と証拠