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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

3-Morpholino-1-[4-(2-oxopiperidin-1-yl)phenyl]-5,6-dihydropyridin-2(1H)-one | CAS 545445-44-1

An advanced dilactam fragment appearing in a published apixaban route, already carrying the para piperidinone substituent while retaining the morpholino-substituted unsaturation used to construct the fused pyrazolopyridinone system.

CAS545445-44-1
Molecular formulaC20H25N3O3
Molecular weight355.4 g/mol

Product overview

Two distinct lactams place this apixaban fragment beyond the nitrophenyl stage: an N-linked piperidin-2-one on the phenyl ring and a morpholino-substituted unsaturated lactam. The remaining double bond supports subsequent fused-ring construction. Verify both lactam units and assess process-related residues alongside the organic impurity profile.

Chemical identity

Chemical name
3-Morpholino-1-[4-(2-oxopiperidin-1-yl)phenyl]-5,6-dihydropyridin-2(1H)-one
CAS number
545445-44-1
Molecular formula
C20H25N3O3
Molecular weight
355.4 g/mol

Application context

In reported apixaban chemistry, this dilactam enters construction of a fused pyrazolopyridinone ester before the final carboxamide stage. Both lactam units and the morpholino-substituted double bond define the required substrate. Where the selected preparation uses copper-mediated chemistry, agree a residue assessment suited to the downstream process alongside chromatographic related-substance controls.

Chemistry and synthetic role

The unsaturated lactam bears a morpholino substituent, while the phenyl group already carries an N-linked piperidinone. Published chemistry uses this architecture for fused-ring assembly. It differs from both the nitro aromatic precursor and the final pyrazolopyridinone carboxamide.

Quality review

Confirm both lactam units

The second piperidinone must be present; CAS 503615-03-0 is a different structural stage.

Establish the unsaturated ring

Agree an identity method that verifies the double bond and morpholino attachment, not only the molecular formula.

Make residue controls route-specific

Ask whether copper-mediated chemistry is used. Set any metal test from the actual route and downstream requirements.

Preparing a specification

Define the complete dilactam structure, required chromatographic purity and relevant ring or aromatic related substances. State the intended fused-ring chemistry. Discuss residual metals only after establishing the proposed route, and distinguish a general purity result from targeted residue data.

Packaging and storage

Agree packaging, net weight and transport arrangements for the selected grade, quantity and destination. Confirm storage and handling conditions using the current SDS for the proposed material.

Documentation

Request structural identification, a batch chromatogram, the proposed specification and current SDS. If a metal-mediated route is declared, confirm availability of suitable residue data and the analytical method before setting acceptance criteria.

Procurement questions

Why is it called a dilactam fragment?

It contains the unsaturated lactam and a separate piperidin-2-one unit.

When should copper residues be included in qualification?

When the proposed manufacturing route uses copper-mediated chemistry, agree a test method and limit suited to the receiving process.

Is this already the apixaban fused-ring product?

No. The cited route uses it before construction of the fused pyrazolopyridinone ester.

Technical sources
  1. PubChem CID 22352226 — structure propertiesPubChem / NCBI
  2. PubChem CID 22352226 — CAS and synonymsPubChem / NCBI
  3. 3-Morpholino-1-[4-(2-oxo-1-piperidyl)phenyl]-5,6-dihydropyridin-2(1H)-oneAiFChem
  4. WO2003049681A2 — Synthesis of 4,5-dihydro-pyrazolo[3,4-c]pyrid-2-onesPatent applicant via Google Patents