Hydrazine → methyl 5-((R)-2-(1-((R)-3-amino-2-methylpropyl)-5-fluoro-2-oxo-1,2-dihydropyridin-3-yl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine-3-carboxylate

온도

50 °C

To a solution of methyl 5-((R)-2-(1-((S)-3-(1,3-dioxoisoindolin-2-yl)-2-methylpropyl)-5-fluoro-2-oxo-1,2-dihydropyridin-3-yl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine-3-carboxylate (110 mg, 0.197 mmol) in MeOH/THF (3 mL/3 mL) was added hydrazine (31.6 mg, 0.985 mmol). The reaction was stirred for 14 hours at 50° C. After cooling, the reaction mixture was concentrated and the resulting residue was diluted with EtOAc (20 mL) and washed with saturated aqueous NaHCO3 (5 mL), water (2×5 mL) and brine (5 mL). The organic layer was dried with Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by silica column chromatography, eluting with EtOAc/MeOH/NH4OH 10:1:0.1 to give the desired product (65 mg, 77% yield). MS (apci) m/z=429.2 (M+H).

1. temperatureAfter cooling
2. concentrationthe reaction mixture was concentrated
3. additionthe resulting residue was diluted with EtOAc (20 mL)
4. washwashed with saturated aqueous NaHCO3 (5 mL), water (2×5 mL) and brine (5 mL)
5. dry with materialThe organic layer was dried with Na2SO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by silica column chromatography
9. washeluting with EtOAc/MeOH/NH4OH 10:1:0.1

ORD 기록

ord-d8d2f22ec6fb43778b5cf480f3a71b0d

출처 데이터셋

uspto-grants-2015_01

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US08933084B2