Back
HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1176186Generated: November 1, 2026

1(2H)-Phthalazinone → 1-Chlorophthalazine

https://huagongshe.com/reaction/1176186

Reaction equation

Participants

RoleNameHCIDCharge
Reactant1(2H)-PhthalazinoneHCID 8394—
ReactantPhosphorus oxychlorideHCID 24813—
Product1-ChlorophthalazineHCID 160793—

Reaction Steps

Compounds of this invention with Formulae I-VIII also could be prepared as illustrated by the exemplary reaction in Scheme 6. Reaction of phthalazin-1(2H)-one with phosphorus oxychloride produced 1-chlorophthalazine, which was reacted with a substituted aniline, such as N-methyl-4-methoxy-aniline, to produce the substituted 1-anilino-phthalazine.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07842805B2
Source datasetuspto-grants-2010_11
ORD IDord-f4bb1095f40e41158e6b753bd289bf94
Source noteuspto-grants-2010_11