p-Toluenesulfonic acid → 5-(5-Chloro-2-{2-[4-(4-fluoro-benzyl)-(2R,5S)-2,5-dimethyl-piperazin-1-yl]-2-oxo-ethoxy}-phenyl)-dihydro-furan-2-one

HRID 11715Notes

Reaction equation

HRID 11715 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([O:15][CH2:16][C:17]([N:19]2[CH2:24][C@H:23]([CH3:25])[N:22]([CH2:26][C:27]3[CH:32]=[CH:31][C:30]([F:33])=[CH:29][CH:28]=3)[CH2:21][C@H:20]2[CH3:34])=[O:18])=[C:6]([CH:8]([OH:14])[CH2:9][CH2:10][C:11](O)=[O:12])[CH:7]=1.C1(C)C=CC(S(O)(=O)=O)=CC=1>C1(C)C=CC=CC=1.C(=O)(O)[O-].[Na+]>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([O:15][CH2:16][C:17]([N:19]2[CH2:24][C@H:23]([CH3:25])[N:22]([CH2:26][C:27]3[CH:32]=[CH:31][C:30]([F:33])=[CH:29][CH:28]=3)[CH2:21][C@H:20]2[CH3:34])=[O:18])=[C:6]([CH:8]2[O:14][C:11](=[O:12])[CH2:10][CH2:9]2)[CH:7]=1

Participants

5

Reactant 2

HCID 6101p-Toluenesulfonic acidHCID 696554904-(5-Chloro-2-{2-[4-(4-fluoro-benzyl)-(2R,5S)-2,5-dimethyl-piperazin-1-yl]-2-oxo-ethoxy}-phenyl)-4-hydroxy-butyric Acid

Product 1

HCID 696557095-(5-Chloro-2-{2-[4-(4-fluoro-benzyl)-(2R,5S)-2,5-dimethyl-piperazin-1-yl]-2-oxo-ethoxy}-phenyl)-dihydro-furan-2-oneYield 109.5%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 516892Sodium BicarbonateSolvent

Procedure

To a solution of 4-(5-chloro-2-{2-[4-(4-fluoro-benzyl)-(2R,5S)-2,5-dimethyl-piperazin-1-yl]-2-oxo-ethoxy}-phenyl)-4-hydroxy-butyric acid (0.050 g, 0.10 mmol) in toluene (5 mL) was added p-toluene sulfonic acid (0.040 g) and the reaction was stirred at reflux for 4 hours. The reaction was cooled, diluted with saturated aqueous sodium bicarbonate and extracted with ethyl acetate. The organic layer was dried over magnesium sulfate, filtered and concentrated in vacuo. Trituration in diethyl ether/hexanes gave the title compound (0.052 g, LRMS: 475.2, 477.3).

Workup

  1. temperatureat reflux for 4 hours
  2. temperatureThe reaction was cooled
  3. extractionextracted with ethyl acetate
  4. dry with materialThe organic layer was dried over magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-f091ce2afc854a4c8b9d7b72de16fbe9
Source dataset
uspto-grants-2006_08
Patent number
US07098212B2

Reaction notes

Loading…