Chemical Identity and Structure

Methyl 3-methyl-4-oxopiperidine-1-carboxylate belongs to the piperidone family of nitrogen heterocycles. Its structure comprises a six-membered saturated ring containing one nitrogen atom at position 1, a ketone carbonyl at position 4, a methyl group at position 3, and a methoxycarbonyl (–CO₂Me) group on the nitrogen atom.

The N-methoxycarbonyl moiety serves as a protecting group for the piperidine nitrogen, moderating nucleophilicity and directing downstream reactivity. The 3-methyl substituent introduces a chiral center at C-3, making this compound a useful scaffold for the preparation of stereodefined intermediates. The C-4 ketone is the primary reactive site, readily undergoing condensations, reductions, and addition reactions under standard laboratory conditions.

This compound is catalogued under SKU M701458 in the Aladdin Scientific portfolio and is supplied for research use in synthetic and medicinal chemistry programs.

Physicochemical Properties and Handling

Methyl 3-methyl-4-oxopiperidine-1-carboxylate is a low-molecular-weight organic solid or oil (exact physical form should be confirmed from the certificate of analysis). The compound contains both a hydrogen-bond-accepting carbonyl and a carbamate group, contributing to moderate polarity and reasonable solubility in common polar organic solvents such as dichloromethane, ethyl acetate, tetrahydrofuran, and dimethyl sulfoxide.

When handling this reagent, standard laboratory precautions should be observed: wear appropriate personal protective equipment (PPE) including nitrile gloves, laboratory coat, and safety glasses. Work in a well-ventilated area or fume hood. Avoid prolonged skin contact or inhalation of dust or vapors. Refer to the Safety Data Sheet (SDS) provided by Aladdin Scientific before use.

For weighing and transfer operations, use a balance enclosure or weigh in a fume hood to minimize exposure. Rinse spills promptly with water and dispose of waste in accordance with local institutional and regulatory guidelines.

Storage Conditions and Stability

To maintain the integrity and purity of Methyl 3-methyl-4-oxopiperidine-1-carboxylate, the following storage guidelines are recommended:

• Temperature: Store at room temperature or below in a cool, dry location. Refrigerated storage (2–8 °C) may extend shelf life for long-term archiving.
• Moisture: Keep the container tightly sealed. The carbamate and ketone functionalities are susceptible to hydrolysis under prolonged exposure to moisture.
• Light: Protect from direct light exposure to prevent photodegradation.
• Container: Use the original manufacturer-supplied container or an equivalent air-tight, chemically compatible vessel.

Before use, allow refrigerated samples to equilibrate to room temperature while the container remains sealed to prevent condensation. Verify compound identity and purity using NMR or HPLC if the material has been stored for an extended period or if the container seal has been compromised.

Synthetic Applications in Medicinal and Heterocyclic Chemistry

Methyl 3-methyl-4-oxopiperidine-1-carboxylate serves as a versatile building block in multi-step organic synthesis. Its key reactive handles—the C-4 ketone and the N-methoxycarbonyl group—enable a range of transformations:

• Reductive amination: The C-4 ketone can react with primary or secondary amines in the presence of reducing agents (e.g., sodium cyanoborohydride or sodium triacetoxyborohydride) to yield 4-aminopiperidine derivatives relevant to CNS drug discovery.
• Wittig and Horner–Wadsworth–Emmons reactions: The ketone participates in olefination reactions to generate exocyclic alkene-functionalized piperidines.
• Condensation reactions: Aldol-type and Knoevenagel condensations extend the carbon framework for the synthesis of more complex scaffolds.
• N-deprotection: The methyl carbamate can be removed under appropriate conditions (e.g., hydrolysis or reduction) to liberate the free piperidine nitrogen for further functionalization.
• Stereoselective synthesis: The C-3 methyl group creates opportunities for diastereoselective reactions, enabling the preparation of chiral piperidine intermediates.

These attributes make the compound particularly valuable in pharmaceutical research programs targeting G-protein coupled receptors (GPCRs), ion channels, and enzyme active sites that accommodate piperidine scaffolds.

Quality Considerations and Procurement

When sourcing Methyl 3-methyl-4-oxopiperidine-1-carboxylate (SKU M701458) from Aladdin Scientific, researchers should request the Certificate of Analysis (CoA) to verify purity, appearance, and batch-specific analytical data prior to incorporation into sensitive synthetic workflows.

Key quality checkpoints include:

• Purity: Confirm purity by GC or HPLC as stated on the CoA. For asymmetric synthesis applications, enantiomeric excess (ee) data may be relevant if a chiral batch is specified.
• Identity confirmation: ¹H NMR and ¹³C NMR spectra or MS data consistent with the expected molecular formula should be reviewed.
• Lot-to-lot consistency: For multi-batch projects, request lot-matching or reserve sufficient material from a single batch to ensure reproducibility.

Procurement teams should note that this compound is catalogued under a single SKU (M701458). Contact Aladdin Scientific technical support for custom quantities, bulk pricing, or specific purity grades not listed in the standard catalog.