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Citric Acid → {2-[7-[(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indol-2-yl]-4,5-dihydro-1,3-thiazol-5-yl}acetic acid

HRID 2239132
Notes
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Reaction equation

HRID 2239132 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:30][C:31]([F:34])([F:33])[F:32])[CH:13]=[C:14]2[C:18]=1[NH:17][C:16]([C:19]1[S:20][CH:21]([CH2:24][C:25]([O:27]CC)=[O:26])[CH2:22][N:23]=1)=[CH:15]2)(=[O:8])=[O:7].[OH-].[Na+].O1CCCC1.C(O)(=O)CC(CC(O)=O)(C(O)=O)O>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:30][C:31]([F:32])([F:34])[F:33])[CH:13]=[C:14]2[C:18]=1[NH:17][C:16]([C:19]1[S:20][CH:21]([CH2:24][C:25]([OH:27])=[O:26])[CH2:22][N:23]=1)=[CH:15]2)(=[O:7])=[O:8]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 311Citric AcidHCID 8028TetrahydrofuranHCID 14798Sodium HydroxideHCID 57476351ethyl{2-(7-[(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indol-2-yl]-4,5-dihydro-1,3-thiazol-5-yl}acetate

Product 1

HCID 59135925{2-[7-[(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indol-2-yl]-4,5-dihydro-1,3-thiazol-5-yl}acetic acid
Yield 66.3%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Conditions

Temperature
50 °C

Procedure

A mixture of ethyl {2-[7-[(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indol-2-yl]-4,5-dihydro-1,3-thiazol-5-yl}acetate (780 mg), 1N aqueous sodium hydroxide solution (5 mL), tetrahydrofuran (5 mL) and ethanol (5 mL) was stirred at 50° C. for 30 min. The reaction mixture was acidified with aqueous citric acid solution, and extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried (MgSO4), and concentrated. The residue was crystallized from ethyl acetate-diisopropyl ether to give the title compound (490 mg, yield 64%) as brown crystals. The crystals were recrystallized from ethyl acetate-hexane to give brown prism crystals. melting point 247-248° 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. customThe residue was crystallized from ethyl acetate-diisopropyl ether

Sources & evidence

ORD record
ord-e380ae17f07144859838e4167e26326c
Source dataset
uspto-grants-2010_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07718798B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes