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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 569774Generated: October 30, 2026

Bromine → 3(2H)-Pyridazinone

https://huagongshe.com/reaction/569774

Reaction equation

Participants

RoleNameHCIDCharge
ReactantBromineHCID 24408—
ReactantHCID 357537HCID 357537—
ReactantHCID 13233881HCID 13233881—
SolventAcetic AcidHCID 176—
Product3(2H)-PyridazinoneHCID 68153—
ProductHCID 12200169HCID 12200169—

Reaction Steps

Using the procedure of this Example, reaction of 4,5-dihydro-2-methyl-6-[4-(1H-imidazol-1-yl)phenyl]-3(2H)-pyridazinone and 4,5-dihydro-2-(2-hydroxyethyl)-6-[4-(1H-imidazol-1-yl)phenyl]-3(2H)-pyridazinone with bromine in acetic acid gives 6-[4-1H-imidazol-1-yl)phenyl]-2-methyl-3(2H)-pyridazinone (13e) and 2-(2-hydroxyethyl)-6-[4-1H-imidazol-1-yl)phenyl]-3(2H)-pyridazinone respectively (13f).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04734415
Source datasetuspto-grants-1988_03
ORD IDord-a88493fbea9346318aed7c1ae6c3ea66
Source noteuspto-grants-1988_03