Dimethylformamide → ethyl 5-(3-methoxypropoxy)-7-[methyl(pyridin-2-ylsulfonyl)amino]-1H-indole-2-carboxylate

HRID 1994837Notes

Reaction equation

HRID 1994837 reaction equation
[CH3:1][O:2][CH2:3][CH2:4][CH2:5][O:6][C:7]1[CH:8]=[C:9]2[C:13](=[C:14]([NH:16][S:17]([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][N:21]=3)(=[O:19])=[O:18])[CH:15]=1)[NH:12][C:11]([C:26]([O:28][CH2:29][CH3:30])=[O:27])=[CH:10]2.[C:31](=O)([O-])[O-].[K+].[K+].CN(C)C=O.CI>O>[CH3:1][O:2][CH2:3][CH2:4][CH2:5][O:6][C:7]1[CH:8]=[C:9]2[C:13](=[C:14]([N:16]([CH3:31])[S:17]([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][N:21]=3)(=[O:18])=[O:19])[CH:15]=1)[NH:12][C:11]([C:26]([O:28][CH2:29][CH3:30])=[O:27])=[CH:10]2

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 57476212ethyl 5-(3-methoxypropoxy)-7-[(pyridin-2-ylsulfonyl)amino]-1H-indole-2-carboxylate

Product 1

HCID 57476211ethyl 5-(3-methoxypropoxy)-7-[methyl(pyridin-2-ylsulfonyl)amino]-1H-indole-2-carboxylateYield 88.6%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To a mixture of ethyl 5-(3-methoxypropoxy)-7-[(pyridin-2-ylsulfonyl)amino]-1H-indole-2-carboxylate (3.97 g), potassium carbonate (1.27 g) and N,N-dimethylformamide (30 mL) was added methyl iodide (1.56 g) at room temperature, and the reaction mixture was stirred at room temperature for 2 hr. Water was added to the reaction mixture, 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 crystallized from ethyl acetate-hexane, and the crystals were washed with hexane to give the title compound (3.63 g, yield 88%) as colorless crystals. The crystals were recrystallized from ethyl acetate-hexane to give colorless prism crystals. melting point 98-99° 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
  5. customThe obtained residue was crystallized from ethyl acetate-hexane
  6. washthe crystals were washed with hexane

Sources & evidence

ORD record
ord-3712f285e3eb476da974a12a5c0c0135
Source dataset
uspto-grants-2010_01
Patent number
US07652133B2

Reaction notes

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