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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1263997Generated: October 30, 2026

4-Hydrazinylbenzenesulfonamide hydrochloride → HCID 178435488, compound

https://huagongshe.com/reaction/1263997

Reaction equation

Participants

RoleNameHCIDCharge
Reactant4-Hydrazinylbenzenesulfonamide hydrochlorideHCID 2794567—
Reactant6-Ethyl-1H-indole-2,3-dioneHCID 13827083—
SolventWaterHCID 962—
ProductHCID 178435488HCID 17843548879%

Reaction Steps

The title compound was prepared from 6ethyl-1H-indole-2,3-dione (Krantz and Young, 1989, U.S. Pat. No. 4,873,232) and 4-sulfonamidophenylhydrazine hydrochloride according to Procedure G in 79% yield: 1H NMR (DMSO-d6): δ 1.16 (t, J=7.5 Hz, 3H), 2.60 (q, J=7.5 Hz, 2H), 6.74 (s, 1H), 6.89 (d, J=7.5 Hz, 1H), 7.22 (s, 2H), 7.46 (d, J=7.5 Hz, 1H), 7.50 (d, J=8.7 Hz, 1H), 7.75 (d, J=8.7 Hz, 2H), 11.02 (s, 1H), 12.70 (s, 1H); APCI−MS m/z 343 (M−H)−. Anal. Calcd for C16H16N4O3S.0.32 H2O: C, 54.88, H, 4.79; N, 16.00; S, 9.16. Found C, 54.81, H, 4.59; N, 16.06; S, 9.04.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06541503B2
Source datasetuspto-grants-2003_04
ORD IDord-50e8065a683942c194d0b193b9ebbe52
Source noteuspto-grants-2003_04