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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1373644Generated: October 26, 2026

4-((7-Oxo-5,6,7,8-tetrahydro-1,8-naphthyridin-2-yl)oxy)butanal → 7-{4-[4-(2-Oxo-1,2,3,4-tetrahydro-quinolin-8-yl)-piperazin-1-yl]-butoxy}-3,4-dihydro-1H-[1,8]naphthyridin-2-one

https://huagongshe.com/reaction/1373644

Reaction equation

Participants

RoleNameHCIDCharge
Reactant4-((7-Oxo-5,6,7,8-tetrahydro-1,8-naphthyridin-2-yl)oxy)butanalHCID 21073377—
Reactant8-piperazin-1-yl-3,4-dihydro-1H-quinolin-2-one hydrochlorideHCID 21073944—
Product7-{4-[4-(2-Oxo-1,2,3,4-tetrahydro-quinolin-8-yl)-piperazin-1-yl]-butoxy}-3,4-dihydro-1H-[1,8]naphthyridin-2-oneHCID 21073625—

Reaction Steps

In a manner similar to that of other examples above, 8-piperazin-1-yl-3,4-dihydro-1H-quinolin-2-one hydrochloride (Chem. Pharm. Bull. 1984, 32, 2100–2110) was coupled by reductive amination to 4-(7-oxo-5,6,7,8-tetrahydro-[1,8]naphthyridin-2-yloxy)-butyraldehyde followed by typical workup and purification to give the title compound. MS: APCI: M+1: 450.2 (Exact Mass: 449.24).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07160888B2
Source datasetuspto-grants-2007_01
ORD IDord-d65d4609daf04f6698d73b9172127097
Source noteuspto-grants-2007_01