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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2372207Generated: October 31, 2026

Hydrazine hydrate (1:1) → 4-(3-FLUOROPHENYL)SEMICARBAZIDE

https://huagongshe.com/reaction/2372207

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrazine hydrate (1:1)HCID 24654—
Reactant3-Fluorophenyl isocyanateHCID 123064—
SolventTolueneHCID 1140—
Solvent1,4-DioxaneHCID 31275—
Product4-(3-FLUOROPHENYL)SEMICARBAZIDEHCID 7567904—

Reaction Steps

A solution of 3-fluorophenyl isocyanate (5.0 g, 36.0 mmol) in 20 ml of toluene is added to hydrazine hydrate (2.1 g, 42.0 mmol) in 70 ml of dioxane, maintaining the temperature of the reaction at less than 12°. After 2 hours, the reaction is filtered and the solvent is removed from the filtrate by rotoevaporation to give the white solid, 4-(3-fluorophenyl)-semicarbazide.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS05098466
Source datasetuspto-grants-1992_03
ORD IDord-950999e15d684a439a758878ce4d3ae9
Source noteuspto-grants-1992_03