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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1700205Generated: October 31, 2026

Ammonium Hydroxide → 2-Oxoindoline-5-sulfonamide

https://huagongshe.com/reaction/1700205

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 the title compound as an off-white solid.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06350754B2
Source datasetuspto-grants-2002_02
ORD IDord-c0e911eac8f649db91c58d6f710ab19b
Source noteuspto-grants-2002_02