Hydrochloric Acid → 7-[(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indole-2-carboxylic acid

HRID 2238979Notes

Reaction equation

HRID 2238979 reaction equation
[S:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[S:6]([NH:9][C:10]1[CH:11]=[C:12]([O:24][C:25]([F:28])([F:27])[F:26])[CH:13]=[C:14]2[C:18]=1[NH:17][C:16]([C:19]([O:21]CC)=[O:20])=[CH:15]2)(=[O:8])=[O:7].[OH-].[Na+].O1CCCC1.Cl>C(O)C>[S:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[S:6]([NH:9][C:10]1[CH:11]=[C:12]([O:24][C:25]([F:27])([F:28])[F:26])[CH:13]=[C:14]2[C:18]=1[NH:17][C:16]([C:19]([OH:21])=[O:20])=[CH:15]2)(=[O:7])=[O:8]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 8028TetrahydrofuranHCID 14798Sodium HydroxideHCID 57476185ethyl 7-[(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indole-2-carboxylate

Product 1

HCID 574761887-[(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indole-2-carboxylic acidYield 93%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of ethyl 7-[(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indole-2-carboxylate (3.0 g), 1N aqueous sodium hydroxide solution (20 mL), tetrahydrofuran (10 mL) and ethanol (10 mL) was stirred at 60° C. for 1 hr. The reaction mixture was acidified with 1N hydrochloric acid, and extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried (MgSO4), and concentrated. The residue was washed with hexane to give the title compound (2.60 g, yield 93%) as pale-yellow crystals. The crystals were recrystallized from ethyl acetate-hexane to give pale-yellow prism crystals. melting point 288-290° C. (decomposition).

Workup

  1. extractionextracted with ethyl acetate
  2. washThe ethyl acetate layer was washed with saturated brine
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated
  5. washThe residue was washed with hexane

Sources & evidence

ORD record
ord-97a1e120aabe4d47891e9c18b6ff753d
Source dataset
uspto-grants-2010_05
Patent number
US07718798B2

Reaction notes

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