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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 12283Generated: October 29, 2026

6-Chloro-3-oxo-2,3-dihydropyridazine-4-carboxylic acid (2-amino-phenyl)amide → 4-(1H-Benzimidazol-2-yl)-6-chloro-2H-pyridazin-3-one

https://huagongshe.com/reaction/12283

Reaction equation

Participants

RoleNameHCIDCharge
Reactant6-Chloro-3-oxo-2,3-dihydropyridazine-4-carboxylic acid (2-amino-phenyl)amideHCID 86611609—
SolventAcetic AcidHCID 176—
Product4-(1H-Benzimidazol-2-yl)-6-chloro-2H-pyridazin-3-oneHCID 135978781—

Reaction Steps

A solution of 26.4 g of 6-chloro-3-oxo-2,3-dihydropyridazine-4-carboxylic acid (2-aminophenyl)amide in 500 ml of acetic acid is stirred at 110° C. for 2.5 hours and then the solvent is distilled off. The crude product obtained in this way is employed without further purification.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07727989B2
Source datasetuspto-grants-2010_06
ORD IDord-0a5a35357a4242119c12cf0fec91f87f
Source noteuspto-grants-2010_06