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

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).

1. customat 0° C.
2. temperatureThe reaction was cooled to 0° C.
3. customcarefully quenched with saturated sodium bicarbonate
4. extractionThe mixture was extracted (2×EtOAc)
5. washthe organics were washed with brine
6. dry with materialThe combined organics were then dried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated to dryness
9. customThe crude residue was chromatographed on silica gel using 20% EtOAc in hexanes as the eluant

ORDレコード

ord-a7353b7755854d3e90ecc9e369043e95

出典データセット

uspto-grants-1998_08

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US05789415