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

HRID 2239134Notes

Reaction equation

HRID 2239134 reaction equation
[CH3:1][O:2][CH2:3][CH2:4][O:5][C:6]1[CH:7]=[C:8]2[C:12](=[C:13]([N:15]([CH3:24])[S:16]([C:19]3[S:20][CH:21]=[CH:22][CH:23]=3)(=[O:18])=[O:17])[CH:14]=1)[NH:11][C:10]([C:25]1[S:26][CH:27]([CH2:30][C:31]([O:33]CC)=[O:32])[CH2:28][N:29]=1)=[CH:9]2.[OH-].[Na+].O1CCCC1.C(O)(=O)CC(CC(O)=O)(C(O)=O)O>C(O)C>[CH3:1][O:2][CH2:3][CH2:4][O:5][C:6]1[CH:7]=[C:8]2[C:12](=[C:13]([N:15]([CH3:24])[S:16]([C:19]3[S:20][CH:21]=[CH:22][CH:23]=3)(=[O:18])=[O:17])[CH:14]=1)[NH:11][C:10]([C:25]1[S:26][CH:27]([CH2:30][C:31]([OH:33])=[O:32])[CH2:28][N:29]=1)=[CH:9]2

Participants

6

Reactant 4

HCID 311Citric AcidHCID 8028TetrahydrofuranHCID 14798Sodium HydroxideHCID 59303535ethyl(2-{5-(2-methoxyethoxy)-7-[methyl(2-thienylsulfonyl)amino]-1H-indol-2-yl}-4,5-dihydro-1,3-thiazol-5-yl)acetate

Product 1

HCID 68460040(2-{5-(2-methoxyethoxy)-7-[methyl(2-thienylsulfonyl)amino]-1H-indol-2-yl}-4,5-dihydro-1,3-thiazol-5-yl)acetic acidYield 98.5%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A mixture of ethyl (2-{5-(2-methoxyethoxy)-7-[methyl(2-thienylsulfonyl)amino]-1H-indol-2-yl}-4,5-dihydro-1,3-thiazol-5-yl)acetate (300 mg), 1N aqueous sodium hydroxide solution (2 mL), tetrahydrofuran (2 mL) and ethanol (2 mL) was stirred at room temperature for 15 hr. 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 to give the title compound (280 mg, yield 97%) as yellow crystals. The crystals were recrystallized from ethyl acetate-hexane to give yellow prism crystals. melting point 113-114° C.

Workup

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

Sources & evidence

ORD record
ord-17ea247faf14497cb6e9f73a000c7ee0
Source dataset
uspto-grants-2010_05
Patent number
US07718798B2

Reaction notes

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