Ethanol → Ethyl 2-(4-fluorophenyl)-3-(1-methyl-1H-1,2,3-triazol-4-yl)-4-oxo-1,2,3,4-tetrahydroquinoline-5-carboxylate

HRID 1968027Notes

Reaction equation

HRID 1968027 reaction equation
[F:1][C:2]1[CH:19]=[CH:18][C:5](/[CH:6]=[N:7]/[C:8]2[CH:16]=[CH:15][CH:14]=[C:13]3[C:9]=2[CH2:10][O:11][C:12]3=[O:17])=[CH:4][CH:3]=1.[CH3:20][N:21]1[CH:25]=[C:24]([CH:26]=O)[N:23]=[N:22]1.[CH2:28]([O-:30])[CH3:29].[Na+].C(O)C>C(OCC)(=O)CC>[F:1][C:2]1[CH:3]=[CH:4][C:5]([CH:6]2[CH:26]([C:24]3[N:23]=[N:22][N:21]([CH3:20])[CH:25]=3)[C:28](=[O:30])[C:29]3[C:13]([C:12]([O:11][CH2:10][CH3:9])=[O:17])=[CH:14][CH:15]=[CH:16][C:8]=3[NH:7]2)=[CH:18][CH:19]=1

Participants

6

Reactant 4

HCID 702EthanolHCID 2723922Sodium ethoxideHCID 143134381-Methyl-1H-1,2,3-triazole-4-carboxaldehydeHCID 178519076HCID 178519076, compound

Product 1

HCID 67261815Ethyl 2-(4-fluorophenyl)-3-(1-methyl-1H-1,2,3-triazol-4-yl)-4-oxo-1,2,3,4-tetrahydroquinoline-5-carboxylateYield 39%

Reagents, catalysts & solvents 1

HCID 7749Ethyl PropionateSolvent

Conditions

Temperature
0 °C

Procedure

A mixture of (E)-4-(4-fluorobenzylideneamino)isobenzofuran-1(3H)-one (698 mg, 2.7 mmol) and 1-methyl-1H-1,2,3-triazole-4-carbaldehyde (334 mg, 3 mmol) in ethyl propionate (35 mL) was cooled to 0° C. Then a solution of sodium ethanolate in ethanol (sodium (248 mg, 10.8 mmol) in ethanol (15 mL)) was added dropwise. After the addition, the mixture was stirred at room temperature for 4 hr. The mixture was quenched with water (10 mL) and solvent was removed in vacuum. The residue was dissolved in water, and then extracted with ethyl acetate (100 mL×4). The combined organic layers were washed with brine, dried over anhydrous sodium sulfate, and concentrated to give crude product, which then was purified by chromatography (silica gel, petroleum ether/ethyl acetate=3:1 to 1:1) to give the title compound (426 mg, yield 39%). LC-MS (ESI) m/z: 395 (M+1)+.

Workup

  1. additionAfter the addition
  2. customThe mixture was quenched with water (10 mL) and solvent
  3. customwas removed in vacuum
  4. dissolutionThe residue was dissolved in water
  5. extractionextracted with ethyl acetate (100 mL×4)
  6. washThe combined organic layers were washed with brine
  7. dry with materialdried over anhydrous sodium sulfate
  8. concentrationconcentrated
  9. customto give crude product, which
  10. customthen was purified by chromatography (silica gel, petroleum ether/ethyl acetate=3:1 to 1:1)

Sources & evidence

ORD record
ord-6736443401f94e0f8962c8d003236e21
Source dataset
uspto-grants-2013_04
Patent number
US08420650B2

Reaction notes

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