Citric Acid → HCID 57476293, compound

HRID 1994902Notes

Reaction equation

HRID 1994902 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]([CH2:17][C:18](OCC)=[O:19])[CH2:15][N:16]=1)=[CH:8]2.[BH4-].[Li+].O1CCCC1.C(O)(=O)CC(CC(O)=O)(C(O)=O)O>CO>[OH:19][CH2:18][CH2:17][CH:14]1[S:13][C:12]([C:9]2[NH:10][C:11]3[C:7]([CH:8]=2)=[CH:6][CH:5]=[CH:4][C:3]=3[N:2]([CH3:1])[S:23]([C:26]2[S:27][CH:28]=[CH:29][CH:30]=2)(=[O:25])=[O:24])=[N:16][CH2:15]1

Participants

6

Reactant 4

HCID 311Citric AcidHCID 8028TetrahydrofuranHCID 4148881Lithium borohydrideHCID 57476282Ethyl(2-{7-[methyl(2-thienylsulfonyl)amino]-1H-indol-2-yl}-4,5-dihydro-1,3-thiazol-5-yl)acetate

Product 1

HCID 57476293HCID 57476293, compoundYield 96%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a mixture of ethyl (2-{7-[methyl(2-thienylsulfonyl)amino]-1H-indol-2-yl}-4,5-dihydro-1,3-thiazol-5-yl)acetate (0.21 g), lithium borohydride (20 mg) and tetrahydrofuran (10 mL) was added methanol (2 mL), and the mixture was stirred at room temperature for 3 hr. Aqueous citric acid solution was added to the reaction solution, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give the title compound (182 mg, yield: 96%) as pale-yellow crystals. A part of the crystals was recrystallized from ethyl acetate-hexane to give pale-yellow crystals. MS: 422 (MH+). melting point 174-175° C.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-1fcb2deb55ae402db97ae643320f4a2c
Source dataset
uspto-grants-2010_01
Patent number
US07652133B2

Reaction notes

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