N,5-Dimethoxy-N-methyl-4-oxo-1-[3-(trifluoromethyl)phenyl]-1,4-dihydropyridazine-3-carboxamide → 3-Acetyl-5-methoxy-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one

HRID 1624587노트

반응식

HRID 1624587 반응식
[CH3:1][Mg+].[Br-].CON(C)[C:7]([C:9]1[C:14](=[O:15])[C:13]([O:16][CH3:17])=[CH:12][N:11]([C:18]2[CH:23]=[CH:22][CH:21]=[C:20]([C:24]([F:27])([F:26])[F:25])[CH:19]=2)[N:10]=1)=[O:8]>C1COCC1>[C:7]([C:9]1[C:14](=[O:15])[C:13]([O:16][CH3:17])=[CH:12][N:11]([C:18]2[CH:23]=[CH:22][CH:21]=[C:20]([C:24]([F:27])([F:26])[F:25])[CH:19]=2)[N:10]=1)(=[O:8])[CH3:1]

참가 물질

4

반응물 2

HCID 86643930N,5-Dimethoxy-N-methyl-4-oxo-1-[3-(trifluoromethyl)phenyl]-1,4-dihydropyridazine-3-carboxamideHCID 178418689HCID 178418689, 화합물

생성물 1

HCID 594362623-Acetyl-5-methoxy-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one수율 79%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

MeMgBr (3 M solution in diethyl ether, 4 mL, 12 mmol) was added dropwise at −78° C. to a solution of N,5-dimethoxy-N-methyl-4-oxo-1-[3-(trifluoromethyl)phenyl]-1,4-dihydropyridazine-3-carboxamide (2.09 g, 5.85 mmol) in THF (50 mL). After stirring for 1 h, the reaction mixture was quenched with saturated NH4Cl aqueous solution and extracted with AcOEt three times. The combined extracts were washed with brine, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography eluting with AcOEt/MeOH (1/0-10/1) and recrystallized from hexane/AcOEt to give the title compound (1.44 g, 79% yield) as off-white crystals: mp 155-156° C.; 1H NMR (300 MHz, CDCl3): δ ppm 2.71 (3H, s), 3.98 (3H, s), 7.68-7.76 (2H, m), 7.83-7.88 (2H, m), 7.94 (1H, s). Anal. Calcd for C14H11F3N2O3: C, 53.85; H, 3.55; N, 8.97. Found: C, 53.79; H, 3.59; N, 9.02.

후처리

  1. customthe reaction mixture was quenched with saturated NH4Cl aqueous solution
  2. extractionextracted with AcOEt three times
  3. washThe combined extracts were washed with brine
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography
  7. washeluting with AcOEt/MeOH (1/0-10/1)
  8. customrecrystallized from hexane/AcOEt

출처 및 근거

ORD 기록
ord-8f74f954d23a438086247d8a65213844
출처 데이터셋
uspto-grants-2014_07
특허 번호
US08778944B2

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