2-Thiophenesulfonyl chloride → ethyl 1-(methoxymethyl)-7-[(2-thienylsulfonyl)amino]-1H-indole-2-carboxylate

HRID 1851357Notes

Reaction equation

HRID 1851357 reaction equation
[NH2:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:10]=1[N:9]([CH2:11][O:12][CH3:13])[C:8]([C:14]([O:16][CH2:17][CH3:18])=[O:15])=[CH:7]2.[S:19]1[CH:23]=[CH:22][CH:21]=[C:20]1[S:24](Cl)(=[O:26])=[O:25]>N1C=CC=CC=1>[CH3:13][O:12][CH2:11][N:9]1[C:10]2[C:6](=[CH:5][CH:4]=[CH:3][C:2]=2[NH:1][S:24]([C:20]2[S:19][CH:23]=[CH:22][CH:21]=2)(=[O:26])=[O:25])[CH:7]=[C:8]1[C:14]([O:16][CH2:17][CH3:18])=[O:15]

Participants

4

Reactant 2

HCID 855182-Thiophenesulfonyl chlorideHCID 57475944ethyl 7-amino-1-(methoxymethyl)-1H-indole-2-carboxylate

Product 1

HCID 57475947ethyl 1-(methoxymethyl)-7-[(2-thienylsulfonyl)amino]-1H-indole-2-carboxylateYield 93%

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

To a mixture of ethyl 7-amino-1-(methoxymethyl)-1H-indole-2-carboxylate (0.70 g) and pyridine (8 mL) was added thiophene-2-sulfonyl chloride (0.57 g) at 0° C., and the mixture was stirred at room temperature for 2 hr. The reaction mixture was concentrated, 10% aqueous citric acid solution was added, 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 (1.03 g, yield 93%) was obtained as a yellow oil from a fraction eluted with ethyl acetate-hexane (1:2, volume ratio).

Workup

  1. concentrationThe reaction mixture was concentrated
  2. addition10% aqueous citric acid solution was added
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe ethyl acetate layer was washed with saturated brine
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-a61af5ef3b36485789b91d9f7f764810
Source dataset
uspto-grants-2015_02
Patent number
US08957070B2

Reaction notes

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