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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1768180Generated: October 25, 2026

benzyl 4-(6-oxo-6,7-dihydro-5H-imidazo[4,5-c]pyridazin-5-yl)piperidine-1-carboxylate → 5-Piperidin-4-yl-5,7-dihydro-6H-imidazo[4,5-c]pyridazin-6-one

https://huagongshe.com/reaction/1768180

Reaction equation

Participants

RoleNameHCIDCharge
Reactantbenzyl 4-(6-oxo-6,7-dihydro-5H-imidazo[4,5-c]pyridazin-5-yl)piperidine-1-carboxylateHCID 22293218—
CatalystPalladiumHCID 23938—
SolventEthanolHCID 702—
Product5-Piperidin-4-yl-5,7-dihydro-6H-imidazo[4,5-c]pyridazin-6-oneHCID 22293303119.8%

Reaction Steps

A solution of benzyl 4-(6-oxo-6,7-dihydro-5H-imidazo[4,5-c]pyridazin-5-yl)piperidine-1-carboxylate (35 mg, 0.099 mmol) and 10% Pd/C (50 mg) in EtOH (5 mL), was hydrogenated under a balloon overnight. The reaction was filtered through Celite with more EtOH and concentrated to afford the title compound (26 mg). MS 220.2 (M+1).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07235545B2
Source datasetuspto-grants-2007_06
ORD IDord-427739c7ef3f4e1abb3c5076b185dc70
Source noteuspto-grants-2007_06