Chemical Identity and Structure

1-Benzyl 3-methyl 5-oxopiperidine-1,3-dicarboxylate (SKU B175441) contains a six-membered piperidine ring as its core scaffold. Three key functional groups define its reactivity: (1) a Cbz (N-carboxybenzyl) carbamate protecting group on the ring nitrogen (N-1), introduced via a benzyl ester linkage; (2) a methyl ester at C-3, which renders this position acidic and amenable to enolisation or decarboxylation; and (3) a ketone carbonyl at C-5, providing an electrophilic site for nucleophilic addition and condensation reactions.

The simultaneous presence of both ester and ketone carbonyls within the same ring classifies this compound as a cyclic beta-ketoester, a class well known for its synthetic versatility. The C-3 methine proton flanked by two electron-withdrawing groups exhibits enhanced acidity, facilitating alkylation, Knoevenagel condensations, and related C–C bond-forming reactions under mild base conditions.

Handling, Storage, and Safety Guidelines

Personal Protective Equipment (PPE): When working with 1-benzyl 3-methyl 5-oxopiperidine-1,3-dicarboxylate, wear appropriate chemical-resistant gloves, a laboratory coat, and safety goggles. Conduct all weighing and transfers in a well-ventilated fume hood to minimise inhalation exposure to fine dust or vapour.

Storage: Store the reagent in a tightly sealed container in a cool, dry location away from direct light, heat sources, and moisture. Segregate from strong oxidisers, strong bases, and reducing agents. Consult the current Safety Data Sheet (SDS) from Aladdin Scientific for specific hazard classifications, GHS pictograms, and first-aid measures before use.

Waste Disposal: Dispose of residues and contaminated materials in accordance with local, regional, and national regulations governing chemical waste. Do not pour organic reagent waste into drains without proper treatment.

Spill Response: In the event of a spill, contain the material, avoid generating dust, and clean up using appropriate inert absorbent material. Consult the SDS for detailed emergency procedures.

Applications in Organic and Medicinal Chemistry

Building Block for Drug Discovery: The oxopiperidine dicarboxylate scaffold is a privileged heterocyclic motif found in numerous pharmacologically active candidates. The orthogonal protecting group strategy—Cbz on nitrogen, methyl ester on carbon—allows chemists to selectively unmask either site, enabling divergent synthetic routes from a single intermediate.

Key Synthetic Transformations:

• Selective deprotection: The Cbz group is cleanly removed by catalytic hydrogenolysis (H₂, Pd/C), liberating the secondary amine for further elaboration without disturbing the methyl ester or ketone.
• Ester hydrolysis and decarboxylation: Base-mediated saponification of the methyl ester followed by thermal decarboxylation provides the monoketone piperidine, simplifying the ring system for downstream derivatisation.
• Reductive amination and condensation: The C-5 ketone serves as a handle for reductive amination with primary or secondary amines, or for Wittig/HWE olefination to introduce unsaturation at C-5.
• Enolate alkylation: The activated C-3 position undergoes clean alkylation with electrophiles under mild base conditions, enabling introduction of side-chain diversity.

These features collectively make 1-benzyl 3-methyl 5-oxopiperidine-1,3-dicarboxylate a valuable precursor for the preparation of piperidine-based CNS-active agents, kinase inhibitors, and other therapeutic leads.

Quality, Purity, and Ordering Information

Reagent Specifications: Researchers should verify the certificate of analysis (CoA) provided with each lot of B175441 for purity, identity confirmation (typically by NMR and/or HPLC), and appearance. Contact Aladdin Scientific technical support for batch-specific documentation or custom purity grades.

Ordering: 1-Benzyl 3-methyl 5-oxopiperidine-1,3-dicarboxylate is available from Aladdin Scientific under SKU B175441. Place orders through the Aladdin Scientific website or authorised distributors. For bulk quantities or custom packaging, contact the sales team directly.

Quality Assurance: Aladdin Scientific applies standard quality control procedures to reagents in this category. Each shipment is accompanied by a CoA traceable to the production lot. Researchers requiring additional characterisation data (e.g., GC, LC-MS, elemental analysis) should specify requirements at the time of order.