Hydrochloric Acid → 1-[2-Fluoro-4-(trifluoromethoxy)phenyl]-5-methoxy-4-oxo-1,4-dihydropyridazine-3-carboxylic acid

HRID 2089823노트

반응식

HRID 2089823 반응식
[F:1][C:2]1[CH:7]=[C:6]([O:8][C:9]([F:12])([F:11])[F:10])[CH:5]=[CH:4][C:3]=1[N:13]1[CH:18]=[C:17]([O:19][CH3:20])[C:16](=[O:21])[C:15]([C:22]([O:24]C)=[O:23])=[N:14]1.[OH-].[Na+].Cl>C1COCC1>[F:1][C:2]1[CH:7]=[C:6]([O:8][C:9]([F:11])([F:12])[F:10])[CH:5]=[CH:4][C:3]=1[N:13]1[CH:18]=[C:17]([O:19][CH3:20])[C:16](=[O:21])[C:15]([C:22]([OH:24])=[O:23])=[N:14]1

참가 물질

5

반응물 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 59436184Methyl 1-[2-fluoro-4-(trifluoromethoxy)phenyl]-5-methoxy-4-oxo-1,4-dihydropyridazine-3-carboxylate

생성물 1

HCID 594361671-[2-Fluoro-4-(trifluoromethoxy)phenyl]-5-methoxy-4-oxo-1,4-dihydropyridazine-3-carboxylic acid수율 98.8%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

To a solution of methyl 1-[2-fluoro-4-(trifluoromethoxy)phenyl]-5-methoxy-4-oxo-1,4-dihydropyridazine-3-carboxylate (3.4 g, 9.3 mmol) in THF (150 mL) was added 1 M NaOH aqueous solution (14 mL, 14 mmol), and the mixture was stirred at room temperature for 30 min. The mixture was acidified with 1 M HCl aqueous solution and concentrated under reduced pressure. The residue was diluted with AcOEt, washed with water and brine, dried over MgSO4, filtered and concentrated under reduced pressure to give the title compound (3.2 g, 97% yield) as a pale yellow amorphous solid: 1H NMR (300 MHz, DMSO-d6): δ ppm 3.88 (3H, s), 7.52-7.59 (1H, m), 7.86 (1H, dd, J=10.8, 2.5 Hz), 7.97 (1H, t, J=8.7 Hz), 8.91 (1H, d, J=1.1 Hz), 14.83 (1H, brs).

후처리

  1. concentrationconcentrated under reduced pressure
  2. additionThe residue was diluted with AcOEt
  3. washwashed with water and brine
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure

출처 및 근거

ORD 기록
ord-a35fc62de9534616be6b097328db5bb0
출처 데이터셋
uspto-grants-2013_05
특허 번호
US08435995B2

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