Water → 3-bromo-1-(2-methoxyethyl)-1H-pyrazole

To a solution of 2-(3-bromo-1H-pyrazol-1-yl)ethanol obtained in Step D of Example 6 (300 mg) in N,N-dimethylformamide (16 mL) were added sodium hydride (55%, 137 mg) and iodomethane (196 μL) under ice-cooling. The reaction mixture was stirred under ice-cooling for 2 hr, water was added thereto, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (150 mg).

1. temperaturecooling
2. temperaturecooling for 2 hr
3. extractionthe mixture was extracted with ethyl acetate
4. dry with materialThe extract was dried over anhydrous sodium sulfate
5. customthe solvent was evaporated under reduced pressure
6. customThe residue was purified by silica gel column chromatography (ethyl acetate/hexane)

ORDレコード

ord-71e9632191554930a2cd0d0635f241e0

出典データセット

uspto-grants-2015_07

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US09085578B2