Water → HCID 73128509, compound

HRID 2237727Notes

Reaction equation

HRID 2237727 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([C:11]2[C:15]([CH:16]=[C:17]3[S:21][C:20](=[O:22])[NH:19][C:18]3=[O:23])=[CH:14][N:13]([C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=3)[N:12]=2)[CH:5]=[CH:6][C:7]=1[O:8][CH2:9][CH3:10].[H-].[Na+].Br[CH2:33][CH3:34].O>CN(C)C=O>[Br:1][C:2]1[CH:3]=[C:4]([C:11]2[C:15]([CH:16]=[C:17]3[S:21][C:20](=[O:22])[N:19]([CH2:33][CH3:34])[C:18]3=[O:23])=[CH:14][N:13]([C:24]3[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=3)[N:12]=2)[CH:5]=[CH:6][C:7]=1[O:8][CH2:9][CH3:10]

Participants

6

Reactant 4

HCID 962WaterHCID 6332Ethyl BromideHCID 24758Sodium hydrideHCID 73128510HCID 73128510, compound

Product 1

HCID 73128509HCID 73128509, compoundYield 49.7%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

5-[3-(3-Bromo-4-ethoxy-phenyl)-1-phenyl-1H-pyrazol-4-yl-methylene]-thiazolidine-2,4-dione (Compound No. 77, 0.10 mg, 0.21 mmol) was dissolved in 1.00 mL of anhydrous dimethylformamide. Sodium hydride (12.74 mg, 0.32 mmol) was added under nitrogen atmosphere and bromoethane (23.72 μL, 0.32 mmol) was added 5 minutes later. The mixture was stirred at room temperature for 2 hours. When the reaction was completed, 10 mL of water was added and the solution was extracted with dichloromethane (10 mL×2 times). The organic layer was washed with brine and dried with anhydrous magnesium sulfate. The solvent was removed under reduced pressure. The product was purified with silica gel chromatography (n-hexane/ethyl acetate=4:1) to obtain 52 mg (49.2%) of the target product in yellow solid form.

Workup

  1. extractionthe solution was extracted with dichloromethane (10 mL×2 times)
  2. washThe organic layer was washed with brine
  3. dry with materialdried with anhydrous magnesium sulfate
  4. customThe solvent was removed under reduced pressure
  5. customThe product was purified with silica gel chromatography (n-hexane/ethyl acetate=4:1)

Sources & evidence

ORD record
ord-469c3cb2579b4a6d8e232c043fcb12d1
Source dataset
uspto-grants-2010_05
Patent number
US07718681B2

Reaction notes

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