Citric Acid → HCID 136060805, compound

HRID 1851543Notes

Reaction equation

HRID 1851543 reaction equation
[CH3:1][N:2]([S:23]([C:26]1[S:27][CH:28]=[CH:29][CH:30]=1)(=[O:25])=[O:24])[C:3]1[CH:4]=[CH:5][CH:6]=[C:7]2[C:11]=1[NH:10][C:9]([C:12]1[S:13][CH:14]=[C:15]([CH2:17][C:18]([O:20]CC)=[O:19])[N:16]=1)=[CH:8]2.[OH-].[Na+].O1CCCC1.C(O)(=O)CC(CC(O)=O)(C(O)=O)O>CO>[CH3:1][N:2]([S:23]([C:26]1[S:27][CH:28]=[CH:29][CH:30]=1)(=[O:25])=[O:24])[C:3]1[CH:4]=[CH:5][CH:6]=[C:7]2[C:11]=1[NH:10][C:9]([C:12]1[S:13][CH:14]=[C:15]([CH2:17][C:18]([OH:20])=[O:19])[N:16]=1)=[CH:8]2

Participants

6

Reactant 4

HCID 311Citric AcidHCID 8028TetrahydrofuranHCID 14798Sodium HydroxideHCID 136060808HCID 136060808, compound

Product 1

HCID 136060805HCID 136060805, compoundYield 63%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
50 °C

Procedure

A mixture of ethyl (2-{7-[methyl(2-thienylsulfonyl)amino]-1H-indol-2-yl}-1,3-thiazol-4-yl)acetate (0.31 g), 1N aqueous sodium hydroxide solution (2.0 mL), tetrahydrofuran (6 mL) and methanol (6 mL) was stirred at 50° C. for 2 hr. To the reaction mixture was added 10% citric acid, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried (MgSO4) and concentrated. The obtained residue was subjected to silica gel column chromatography and the title compound (0.18 g, yield 63%) was obtained as pale-yellow crystals from a fraction eluted with tetrahydrofuran-hexane (2:1, volume ratio). The crystals were recrystallized from ethyl acetate-hexane. melting point 214-215° C.

Workup

  1. extractionthe mixture was extracted 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-c188ba2371ac41ce95c3c43d3206a264
Source dataset
uspto-grants-2015_02
Patent number
US08957070B2

Reaction notes

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