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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2263576Generated: October 31, 2026

Hydrochloric Acid → HCID 66603128, compound

https://huagongshe.com/reaction/2263576

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
ReactantTriethylamineHCID 8471—
Reactant1,2-Dimethylhydrazine dihydrochlorideHCID 9380—
Reactant4-Bromophthalic anhydrideHCID 66590—
SolventEthanolHCID 702—
ProductHCID 66603128HCID 6660312843.5%

Reaction Steps

A suspension of 4-bromophthalic anhydride (1.0 g) in EtOH (10 mL) was treated with 1,2,-dimethylhydrazine dihydrochloride (650 mg) and NEt3 (1.35 mL) and heated at reflux during 16 h. The reaction mixture was cooled and diluted into 0.1M HCl (100 mL). The resμLting white solid was collected by filtration, washed with water, and dried in vacuo to give 6-bromo-2,3-dimethyl-2,3-dihydrophthalazine-1,4-dione (516 mg), m.p. 207-209.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07851637B2
Source datasetuspto-grants-2010_12
ORD IDord-e777fd22a7704de4a92951f5b0ebd005
Source noteuspto-grants-2010_12