反应详情

3-(4-(piperazin-1-yl)-3-fluorophenyl)-5(R)-(isoxazol-3-yloxymethyl)oxazolidin-2-one dihydrochloride (1.29 g, 3 mmol) was suspended in dichloromethane (25 ml) under nitrogen at ambient temperature. Triethylamine (1.06 g, 10.5 mmol) was added, to give a solution after 15 minutes. The mixture was cooled to 4°, and acetoxyacetyl chloride (410 mg, 3 mmol) was added dropwise. The mixture was stirred for 18 hours at ambient temperature, washed with water (2×20 ml), saturated brine (20 ml), and dried (magnesium sulfate). The residue was purified by chromatography on a 20 g silica Mega Bond Elut® column, eluting with a gradient increasing in polarity from 0 to 5% MeOH in dichloromethane. Relevant fractions were combined and evaporated to give the desired product (1.16 g).

1. customto give a solution after 15 minutes
2. temperatureThe mixture was cooled to 4°
3. washwashed with water (2×20 ml), saturated brine (20 ml)
4. dry with materialdried (magnesium sulfate)
5. customThe residue was purified by chromatography on a 20 g silica Mega Bond Elut® column
6. washeluting with a gradient
7. temperatureincreasing in polarity from 0 to 5% MeOH in dichloromethane
8. customevaporated