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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 870723Generated: October 31, 2026

Pyridine → HCID 86696428, compound

https://huagongshe.com/reaction/870723

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPyridineHCID 1049—
Reactant4-Bromobutyryl chlorideHCID 70225—
Reactant6-Chloroimidazo[1,2-b]pyridazin-3-amineHCID 10702273—
SolventTetrahydrofuranHCID 8028—
SolventEthyl AcetateHCID 8857—
ProductHCID 86696428HCID 8669642874%

Reaction Steps

To 1.0 g (5.930 mmol) of 6-chloroimidazo[1,2-b]pyridazin-3-amine dissolved in 15 mL of THF was added 4-bromobutanoyl chloride (1.21 g, 6.52 mmol) and pyridine (0.96 mL, 11.86 mmol). This mixture was stirred for 1 hr at rt, and then diluted with 30 mL EtOAc and quenched with aq. NaHCO3. The organic layer was separated and washed with brine, dried over MgSO4, and concentrated. The solid obtained (1.39 g, 74% yield) was pure enough to be used for the next step without further purification.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08969565B2
Source datasetuspto-grants-2015_03
ORD IDord-07cadc98406d4817a2c9c53c3161d30a
Source noteuspto-grants-2015_03