Chloromethyl Methyl Ether → 5-chloromethyl-3H-benzofuran-2-one

関与物質

反応手順

To a solution of 3H-benzofuran-2-one (7.45 mmol) and chlormethyl methyl ether (9.31 mmol) in 15 ml of CH2Cl2 at 0° C. was slowly added SnCl4 (15 mmol). The reaction was slowly allowed to warm to ambient temperature and was stirred for 2 hours. The reaction was cooled to 0° C. and carefully quenched with saturated sodium bicarbonate. The mixture was extracted (2×EtOAc) and the organics were washed with brine. The combined organics were then dried over MgSO4, filtered and concentrated to dryness. The crude residue was chromatographed on silica gel using 20% EtOAc in hexanes as the eluant to obtain the title compound (55).

情報源と証拠