Hydrochloric Acid → 6,8-Dichloro-7-(4-(4-chlorophenethylcarbamoyl) phenoxy)chroman-4-carboxylic acid

HRID 1048055Notes

Reaction equation

HRID 1048055 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]2[C:9](=[C:10]([Cl:31])[C:11]=1[O:12][C:13]1[CH:18]=[CH:17][C:16]([C:19](=[O:30])[NH:20][CH2:21][CH2:22][C:23]3[CH:28]=[CH:27][C:26]([Cl:29])=[CH:25][CH:24]=3)=[CH:15][CH:14]=1)[O:8][CH2:7][CH2:6][CH:5]2[C:32]([O:34]CC)=[O:33].[OH-].[Na+].Cl.CCOC(C)=O>CCO.C1COCC1>[Cl:1][C:2]1[CH:3]=[C:4]2[C:9](=[C:10]([Cl:31])[C:11]=1[O:12][C:13]1[CH:18]=[CH:17][C:16]([C:19](=[O:30])[NH:20][CH2:21][CH2:22][C:23]3[CH:28]=[CH:27][C:26]([Cl:29])=[CH:25][CH:24]=3)=[CH:15][CH:14]=1)[O:8][CH2:7][CH2:6][CH:5]2[C:32]([OH:34])=[O:33]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 8857Ethyl AcetateHCID 14798Sodium HydroxideHCID 67080461Ethyl 6,8-dichloro-7-(4-(4-chlorophenethylcarbamoyl)phenoxy)chroman-4-carboxylate

Product 1

HCID 445995876,8-Dichloro-7-(4-(4-chlorophenethylcarbamoyl) phenoxy)chroman-4-carboxylic acidYield 110.1%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

Ethyl 6,8-dichloro-7-(4-(4-chlorophenethylcarbamoyl)phenoxy)chroman-4-carboxylate (26.8 g, 48.83 mmol) was dissolved in 200 proof EtOH (50 ml)-THF (170 ml). 6N NaOH solution (12.21 ml, 73.25 mmol) was added to the mixture at ambient temperature. The mixture was stirred for 1 hour at ambient temperature. The mixture was transferred to a separatory funnel. 1N HCl solution (97.66 ml, 97.66 mmol) was added to the separatory funnel and EtOAc (100 ml) was added. The mixture was shaken and stood for layer separation. The layers were separated and the organic layer was washed with water and brine (100 ml), dried over MgSO4, filtered, and concentrated to provide 28 g of foamy brown solid after drying under high vacuum. The crude solid was recrystallized from THF-hexanes to provide 22.8 g of the title compound as a white solid (89%).

Workup

  1. customThe mixture was transferred to a separatory funnel
  2. additionwas added
  3. stirringThe mixture was shaken
  4. customstood for layer separation
  5. customThe layers were separated
  6. washthe organic layer was washed with water and brine (100 ml)
  7. dry with materialdried over MgSO4
  8. filtrationfiltered
  9. concentrationconcentrated

Sources & evidence

ORD record
ord-c3353edfb4c44adc88e1dd03f6e3462d
Source dataset
uspto-grants-2013_10
Patent number
US08569522B2

Reaction notes

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