تفاعل #85659
ord-6a98da00d7f44055a93b117d3b0bcd70
معادلة التفاعل
المتفاعلات
الكواشف
ظروف التفاعل
المعالجة
- 1workup.STIRRINGstirred for 5 min
- 2أخرىThe aqueous layer was separated
- 3استخلاصextracted with ethylacetate (25 mL)
- 4غسيلThe combined organic layers were washed with brine (30 mL)
- 5تجفيفdried over sodium sulfate
- 6ترشيحfiltered off
- 7تركيزconcentrated under reduced pressure
- 8أخرىThe residue was purified by column chromatography [SiO2, 12 g, EtOAc/heptane]
الإجراء التجريبي
To a solution of (S)-4-((R)-1,1-difluoropropan-2-yl)oxazolidin-2-one (114 mg, 069 mmol) and 2,4-dichloro-5-fluoropyrimidine (115 mg, 0.690 mmol) in DMF (2.26 mL) was added sodium hydride (60% wt.; 35.9 mg) in three portions at <0° C. (sodium chloride/ice). After the first portion of sodium hydride the mixture was stirred for ˜5 min. The remaining two portions of sodium hydride were added over ˜5 min and stirring was continued for 30 min. The mixture was diluted with ethylacetate (10 mL), stirred for 5 min and further slowly diluted with brine/water (1/1; 10 mL). The mixture was allowed to warm to 5° C. and poured into a mixture of brine/water (1/1; 10 mL) and ethylacetate (10 mL). The aqueous layer was separated and extracted with ethylacetate (25 mL). The combined organic layers were washed with brine (30 mL), dried over sodium sulfate, filtered off and concentrated under reduced pressure. The residue was purified by column chromatography [SiO2, 12 g, EtOAc/heptane] to provide (S)-3-(2-chloro-5-fluoropyrimidin-4-yl)-4-((R)-1,1-difluoropropan-2-yl)oxazolidin-2-one (134 mg) as a white solid. MS m/z 296.1 (M+H)+; Rt-0.75 min. 1H NMR (400 Mhz, CD3OD) δ ppm 8.69 (d, J=2.6 Hz, 1H), 5.99 (q, J=1.0 Hz, 1H), 5.17 (ddd, J=3.5, 7.4, 8.6 Hz, 1H), 4.69-4.50 (m, 2H), 2.88-2.70 (m, 1H), 1.04 (d, J=7.1 Hz, 3H).