Hydrochloric Acid → 5-Phenylaminosulfonyl-2-oxindole

HRID 1815270Notes

Reaction equation

HRID 1815270 reaction equation
Cl[S:2]([C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][CH:13]=1)[NH:10][C:9](=[O:14])[CH2:8]2)(=[O:4])=[O:3].[NH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1.N1C=CC=CC=1.Cl>ClCCl.C(OCC)(=O)C>[C:16]1([NH:15][S:2]([C:5]2[CH:6]=[C:7]3[C:11](=[CH:12][CH:13]=2)[NH:10][C:9](=[O:14])[CH2:8]3)(=[O:4])=[O:3])[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 1049PyridineHCID 6115AnilineHCID 49625062-oxo-2,3-dihydro-1H-indole-5-sulfonyl chloride

Product 1

HCID 163836185-Phenylaminosulfonyl-2-oxindole

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

A suspension of 5-chlorosulfonyl-2-oxindole (1.62 g, 7 mmol), aniline (0.782 mL, 8.4 mmol) and pyridine (1 mL) in dichloromethane (20 ml) was stirred at room temperature for 4 hours. The reaction mixture was diluted with ethyl acetate (300 mL) and acidified with 1N hydrochloric acid (16 mL). The organic layer was washed with sodium bicarbonate and brine, dried and concentrated. The residue was washed with ethanol (3 mL) and then chromatographed on silica gel eluting with methanol/dichloromethane 1:9 to give of 5-phenylaminosulfonyl-2-oxindole.

Workup

  1. washThe organic layer was washed with sodium bicarbonate and brine
  2. customdried
  3. concentrationconcentrated
  4. washThe residue was washed with ethanol (3 mL)
  5. customchromatographed on silica gel eluting with methanol/dichloromethane 1:9

Sources & evidence

ORD record
ord-43e5de9c8e1c4b59a003081712602e65
Source dataset
uspto-grants-2005_04
Patent number
US06878733B1

Reaction notes

Loading…