Benzaldehyde → 5-Methoxy-3-(2-phenyl-1H-imidazol-1-yl)-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one

HRID 1805662ノート

反応式

HRID 1805662 の反応式
[NH2:1][C:2]1[C:7](=[O:8])[C:6]([O:9][CH3:10])=[CH:5][N:4]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([C:17]([F:20])([F:19])[F:18])[CH:12]=2)[N:3]=1.[CH:21]([CH:23]=O)=O.[CH:25](=O)[C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1.[NH4+:33].[Cl-].OP(O)(O)=O>CO.O.C([O-])(O)=O.[Na+]>[CH3:10][O:9][C:6]1[C:7](=[O:8])[C:2]([N:1]2[CH:23]=[CH:21][N:33]=[C:25]2[C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=2)=[N:3][N:4]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([C:17]([F:18])([F:20])[F:19])[CH:12]=2)[CH:5]=1

参加物

9

反応物 5

HCID 240BenzaldehydeHCID 1004Phosphoric AcidHCID 7860GlyoxalHCID 25517Ammonium ChlorideHCID 59436209HCID 59436209、化合物

生成物 1

HCID 580722075-Methoxy-3-(2-phenyl-1H-imidazol-1-yl)-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one収率 29.1%

試薬・触媒・溶媒 3

HCID 887Methanol溶媒HCID 962Water溶媒HCID 516892Sodium Bicarbonate溶媒

実験手順

A solution of 3-amino-5-methoxy-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one (300 mg, 1.05 mmol) and glyoxal (40% solution, 0.240 mL, 2.10 mmol) in MeOH (3 mL) was stirred at room temperature for 24 h. To the solution were added benzaldehyde (0.428 mL, 4.21 mmol) and NH4Cl (225 mg, 4.21 mmol). The mixture was heated to reflux for 2 h. To the mixture was added H3PO4 (0.142 mL). The mixture was heated to reflux for 20 h. The mixture was diluted with water and saturated NaHCO3 aqueous solution, extracted with AcOEt, dried over Na2SO4, filtered, concentrated in vacuo, purified by column chromatography on basic silica gel (hexane/AcOEt=50/50 to 0/100) and by HPLC and recrystallized with AcOEt/hexane to yield the title compound (126 mg, 29% yield) as a white solid: mp 167-170° C. 1H NMR (DMSO-d6, 300 MHz): δ ppm 3.94 (3H, s), 7.19 (1H, d, J=1.5 Hz), 7.31-7.49 (5H, m), 7.61 (1H, d, J=1.5 Hz), 7.68-7.91 (4H, m), 8.80 (1H, s). Anal. Calcd for C21H15F3N4O2.0.7H2O: C, 59.35; H, 3.89; N, 13.18. Found: C, 59.28; H, 3.69; N, 13.12.

後処理

  1. temperatureThe mixture was heated
  2. temperatureto reflux for 2 h
  3. temperatureThe mixture was heated
  4. temperatureto reflux for 20 h
  5. extractionextracted with AcOEt
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. custompurified by column chromatography on basic silica gel (hexane/AcOEt=50/50 to 0/100) and by HPLC
  10. customrecrystallized with AcOEt/hexane

出典と根拠

ORDレコード
ord-1691447e35fc44e18f96b1d6a93624f9
出典データセット
uspto-grants-2013_01
特許番号
US08354411B2

反応ノート

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