Hydrazine → tert-butyl (S)-1-((R)-2,2,2-trifluoro-1-(6-hydrazinylpyridin-3-yl)ethyl)pyrrolidin-3-ylcarbamate

HRID 338845노트

반응식

HRID 338845 반응식
Cl[C:2]1[N:7]=[CH:6][C:5]([C@@H:8]([N:13]2[CH2:17][CH2:16][C@H:15]([NH:18][C:19](=[O:25])[O:20][C:21]([CH3:24])([CH3:23])[CH3:22])[CH2:14]2)[C:9]([F:12])([F:11])[F:10])=[CH:4][CH:3]=1.[NH2:26][NH2:27]>C(O)C(C)C>[F:10][C:9]([F:12])([F:11])[C@H:8]([N:13]1[CH2:17][CH2:16][C@H:15]([NH:18][C:19](=[O:25])[O:20][C:21]([CH3:24])([CH3:23])[CH3:22])[CH2:14]1)[C:5]1[CH:6]=[N:7][C:2]([NH:26][NH2:27])=[CH:3][CH:4]=1

참가 물질

4

반응물 2

HCID 9321HydrazineHCID 86707413tert-butyl (S)-1-((R)-1-(6-chloropyridin-3-yl)-2,2,2-trifluoroethyl)pyrrolidin-3-ylcarbamate

생성물 1

HCID 86707414tert-butyl (S)-1-((R)-2,2,2-trifluoro-1-(6-hydrazinylpyridin-3-yl)ethyl)pyrrolidin-3-ylcarbamate수율 100.6%

시약·촉매·용매 1

HCID 6560Isobutanol용매

실험 절차

A solution of tert-butyl (S)-1-((R)-1-(6-chloropyridin-3-yl)-2,2,2-trifluoroethyl)pyrrolidin-3-ylcarbamate (68.5 g, 180.4 mmol) and anhydrous hydrazine (56.61 mL, 1804 mmol) in i-BuOH (80 mL) was stirred at 106° C. in a sealed flask for 16 hours. After cooling to ambient temperature, the solvent was removed under reduced pressure. The residue was partitioned in ethyl acetate (800 mL) and water (100 mL). The organic layer was separated, washed with brine, dried (sodium sulfate), filtered and concentrated under reduced pressure to give tert-butyl (S)-1-((R)-2,2,2-trifluoro-1-(6-hydrazinylpyridin-3-yl)ethyl)pyrrolidin-3-ylcarbamate (68.1 g, 95.6%) as white foam solid. Enantiomeric excess was determined by chiral HPLC (Chiralcel OD-H, 90% hexane/10% (1:1 MeOH/EtOH) at 1.0 mL/min, >99% d.e. (R,S)-diastereomer).

후처리

  1. customthe solvent was removed under reduced pressure
  2. customThe residue was partitioned in ethyl acetate (800 mL)
  3. customThe organic layer was separated
  4. washwashed with brine
  5. dry with materialdried (sodium sulfate)
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure

출처 및 근거

ORD 기록
ord-18487635e55440b4aa01771103956739
출처 데이터셋
uspto-grants-2014_11
특허 번호
US08889704B2

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