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 1624587ノート

反応式

HRID 1624587 の反応式
[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]

参加物

4

反応物 2

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

生成物 1

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

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

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.

後処理

  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

出典と根拠

ORDレコード
ord-8f74f954d23a438086247d8a65213844
出典データセット
uspto-grants-2014_07
特許番号
US08778944B2

反応ノート

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