Dimethyl Sulfoxide → 1-(4-Fluoro-3-methoxyphenyl)ethanone

Temperature

-78 °C

A solution of dimethyl sulfoxide (1.33 mL) in dichloromethane (5 mL) was added dropwise to a solution of oxalyl chloride (1.63 mL) in dichloromethane (80 mL) in a nitrogen atmosphere at −78° C. After stirring the reaction solution at −78° C. for 3 minutes, a solution of 1-(4-fluoro-3-methoxyphenyl)ethanol (2.6 g) in dichloromethane (15 mL) was added dropwises to the reaction solution. Further, the reaction solution was stirred at −78° C. for 20 minutes, and triethylamine (10.8 mL) was added dropwise to the reaction solution. Then, the reaction solution was stirred at −78° C. for 10 minutes, and further stirred at room temperature for 30 minutes. Water and dichloromethane were added to the reaction solution and the organic layer was partitioned. The resulting organic layer was dried over magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (elution solvent:heptane-ethyl acetate system) to obtain 2.54 g of the title compound. The physical properties of the compound are as follows.

1. stirringFurther, the reaction solution was stirred at −78° C. for 20 minutes
2. stirringThen, the reaction solution was stirred at −78° C. for 10 minutes
3. stirringfurther stirred at room temperature for 30 minutes
4. customthe organic layer was partitioned
5. dry with materialThe resulting organic layer was dried over magnesium sulfate
6. customthe solvent was evaporated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (elution solvent:heptane-ethyl acetate system)

ORD record

ord-081bdbf136c44db585c7dc6f2d98d825

Source dataset

uspto-grants-2010_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07667041B2