Acetic Acid → (R)-ethyl 5-(2-(5-fluoro-2-oxo-1,2-dihydropyridin-3-yl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine-3-carboxylate

HRID 1631309노트

반응식

HRID 1631309 반응식
[F:1][C:2]1[CH:3]=[C:4]([C@H:10]2[CH2:14][CH2:13][CH2:12][N:11]2[C:15]2[CH:20]=[CH:19][N:18]3[N:21]=[CH:22][C:23]([C:24]([O:26][CH2:27][CH3:28])=[O:25])=[C:17]3[N:16]=2)[C:5]([O:8]C)=[N:6][CH:7]=1.CC(O)=O.Br>CCOC(C)=O>[F:1][C:2]1[CH:3]=[C:4]([C@H:10]2[CH2:14][CH2:13][CH2:12][N:11]2[C:15]2[CH:20]=[CH:19][N:18]3[N:21]=[CH:22][C:23]([C:24]([O:26][CH2:27][CH3:28])=[O:25])=[C:17]3[N:16]=2)[C:5](=[O:8])[NH:6][CH:7]=1

참가 물질

5

반응물 3

HCID 176Acetic AcidHCID 260Hydrogen BromideHCID 86664565(R)-ethyl 5-(2-(5-fluoro-2-methoxypyridin-3-yl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine-3-carboxylate

생성물 1

HCID 86664568(R)-ethyl 5-(2-(5-fluoro-2-oxo-1,2-dihydropyridin-3-yl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine-3-carboxylate수율 76%

시약·촉매·용매 1

HCID 8857Ethyl Acetate용매

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온도
90 °C

실험 절차

To a mixture of (R)-ethyl 5-(2-(5-fluoro-2-methoxypyridin-3-yl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine-3-carboxylate (1.0 g, 2.60 mmol, Preparation K, Step A) and AcOH (7.44 mL, 130 mmol) was added HBr (4.76 mL, 33 wt % in acetic acid, 26 mmol) at ambient temperature. The reaction mixture was heated at 90° C. for 2 hours. After cooling, the reaction mixture was diluted with EtOAc, washed with water, saturated NaHCO3, and brine, dried with MgSO4, filtered and concentrated. The crude material was purified by silica column chromatography, eluting with 2-3% MeOH/DCM to yield the title product (0.73 g, 76%). MS (apci) m/z=372.0 (M+H).

후처리

  1. temperatureAfter cooling
  2. washwashed with water, saturated NaHCO3, and brine
  3. dry with materialdried with MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe crude material was purified by silica column chromatography
  7. washeluting with 2-3% MeOH/DCM

출처 및 근거

ORD 기록
ord-38d026e24cbb4aa78ccf6443eef25abe
출처 데이터셋
uspto-grants-2014_07
특허 번호
US08791123B2

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