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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 49117Generated: October 30, 2026

Ammonium Hydroxide → 2-Oxoindoline-5-sulfonamide

https://huagongshe.com/reaction/49117

Reaction equation

Participants

RoleNameHCIDCharge
ReactantAmmonium HydroxideHCID 14923—
Reactant2-oxo-2,3-dihydro-1H-indole-5-sulfonyl chlorideHCID 4962506—
SolventEthanolHCID 702—
Product2-Oxoindoline-5-sulfonamideHCID 1019823220%

Reaction Steps

5-Chlorosulfonyl-2-oxindole (2.1 g) was added to 10 mL of ammonium hydroxide in 10 mL of ethanol and stirred at room temperature overnight. The mixture was concentrated and the solid collected by vacuum filtration to give 0.4 g (20% yield) of 5-aminosulfonyl-2-oxindole as an off-white solid.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06706709B2
Source datasetuspto-grants-2004_03
ORD IDord-d8cb293c47f7474dadd11f7c0d04fa35
Source noteuspto-grants-2004_03