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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 527321Generated: October 28, 2026

Sulfanilamide → HCID 86701915, compound

https://huagongshe.com/reaction/527321

Reaction equation

Participants

RoleNameHCIDCharge
ReactantSulfanilamideHCID 5333—
ReactantHydrazine hydrate (1:1)HCID 24654—
Reactant2-Cyano-3,3-bis(methylthio)acrylamideHCID 2747746—
SolventEthanolHCID 702—
ProductHCID 86701915HCID 86701915—

Reaction Conditions

Temperature75 °C

Reaction Steps

Dissolved 0.500 g 2-cyano-3,3-bis(methylthio)acrylamide in 15 mL EtOH and added Sulfanilamide (1.0 eq.). Stirred reaction at 75° C. until starting amide was absent by HPLC. Once complete (18 hrs), reaction was brought to room temperature and filtered to obtain a light yellow powder as product. Product was allowed to dry under vacuum for 1 hr. Product was then suspended in 10 mL EtOH and hydrazine hydrate (1 eq.) was added dropwise. Reaction was heated at 75° C. until intermediate was absent (HPLC). Once intermediate was absent (18 hrs), reaction was brought to room temperature and filtered to obtain 5-amino-3-((4-sulfamoylphenyl)amino)-1H-pyrazole-4-carboxamide as a yellow powder. Product was allowed to dry under vacuum for 1 hr.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS09346792B2
Source datasetuspto-grants-2016_05
ORD IDord-aa1c9eb1f7264341b0712b969a79c737
Source noteuspto-grants-2016_05