N-Methylcyclopropanamine: Properties, Uses & Lab Guide

N-Methylcyclopropanamine is a secondary aliphatic amine featuring a strained cyclopropyl ring, making it a versatile building block for medicinal chemistry, agrochemical research, and diverse organic synthesis applications.

Chemical Class

Secondary aliphatic amine (cyclopropyl-substituted)

Molecular Formula

C4H9N

Molecular Weight

71.12 g/mol

Key Functional Group

Secondary amine (N–H) with cyclopropyl and N-methyl substituents

Primary Research Use

Synthetic building block for pharmaceuticals and agrochemicals

SKU

N725431

Chemical Identity and Physical Properties

N-Methylcyclopropanamine (also written as N-methyl-cyclopropylamine) is a low-molecular-weight secondary amine with the molecular formula C₄H₉N and a molecular weight of approximately 71.12 g/mol. The compound consists of a cyclopropyl ring attached to a nitrogen atom that also bears a methyl group and one N–H hydrogen, classifying it as a secondary amine.

The presence of the cyclopropyl ring imparts distinctive electronic and steric properties. The ring carbon–carbon bonds are bent, resulting in significant s-character in the exocyclic C–N bond. This influences the basicity and nucleophilicity of the nitrogen relative to acyclic dialkylamines. As a low-boiling liquid at ambient conditions, N-Methylcyclopropanamine should be stored in a tightly sealed container under cool, dry, and well-ventilated conditions away from oxidizing agents and strong acids.

Researchers should note that, like most aliphatic amines, the compound is flammable and its vapors may be irritating to the respiratory tract, eyes, and skin. Appropriate personal protective equipment (PPE)—including nitrile gloves, safety glasses, and lab coat—should be worn during handling.

Synthetic Utility and Applications in Research

N-Methylcyclopropanamine is widely valued as a synthetic building block in medicinal chemistry and agrochemical research. The cyclopropyl group is a privileged scaffold in drug discovery because it can improve metabolic stability, modulate lipophilicity (logP), and introduce conformational rigidity into drug candidates compared with open-chain alkyl bioisosteres.

As a secondary amine, N-Methylcyclopropanamine readily undergoes a broad range of transformations common to amine chemistry:

• Amide coupling: Reaction with carboxylic acids or activated acid derivatives (e.g., acid chlorides, NHS esters) to form amides, useful in the synthesis of amide-containing pharmacophores.
• Reductive amination: Condensation with aldehydes or ketones followed by reduction to introduce the N-methylcyclopropyl motif into target molecules.
• Nucleophilic substitution: Alkylation with electrophilic partners such as alkyl halides or sulfonates to build more complex tertiary amine scaffolds.
• Heterocycle synthesis: Use as a nitrogen source in cyclization reactions to construct nitrogen-containing heterocycles.

The N-methyl group provides an additional handle for further functionalization and can influence the conformational preferences and biological profile of synthesized compounds. These attributes make N-Methylcyclopropanamine a practical reagent for hit-to-lead and lead optimization campaigns in pharmaceutical research.

Handling, Safety, and Storage Guidelines

Safe handling of N-Methylcyclopropanamine requires adherence to standard laboratory practices for reactive, flammable, and volatile amines. The following guidelines are recommended:

• Ventilation: Always work in a fume hood or with local exhaust ventilation to prevent inhalation of vapors.
• PPE: Wear chemical-resistant nitrile gloves, splash-proof safety goggles, and a lab coat. A face shield is advisable when working with larger quantities.
• Fire safety: Keep away from open flames, sparks, and heat sources. Use non-sparking tools and grounded equipment when transferring the compound.
• Spill response: Absorb small spills with inert material (e.g., vermiculite or dry sand); avoid using paper towels, which can increase evaporation. Dispose of waste in accordance with local regulations.
• Storage: Store in a tightly sealed container at controlled room temperature (15–25 °C) or as specified on the product label, in a flammables cabinet separated from oxidizers and acids.
• Incompatibilities: Strong oxidizing agents, strong acids, and halogenated compounds should be kept away from this reagent.

Always consult the Safety Data Sheet (SDS) provided by Aladdin Scientific before first use, and ensure all laboratory personnel are trained on the relevant hazards.

Quality, Purity, and Procurement Considerations

For reproducible experimental results, the purity of N-Methylcyclopropanamine is a critical parameter. When selecting a commercial source, researchers and procurement teams should consider the following:

• Purity specification: For most synthetic applications, a purity of ≥97% (GC) is adequate. Highly sensitive assays or reference standard applications may require higher purity grades; consult Aladdin Scientific's technical team for custom specifications.
• Analytical certificates: Request a Certificate of Analysis (CoA) confirming identity (e.g., by NMR or GC-MS), purity, water content, and lot-specific data before use in critical experiments.
• Packaging and quantity: The compound is typically available in gram-to-kilogram quantities. Smaller pack sizes are recommended for infrequent users to minimize exposure to air and moisture upon repeated opening.
• Shelf life: Store under recommended conditions and observe the manufacturer's stated shelf life. Discard or re-test material showing signs of discoloration or unusual odor.
• Regulatory and import considerations: Buyers should verify local import and handling regulations for amine-containing reagents, particularly in jurisdictions with controlled-substance analog rules.

Aladdin Scientific's N-Methylcyclopropanamine (SKU: N725431) is available for research use. Contact our sales or technical support team for bulk pricing, custom packaging, or application-specific guidance.

Frequently asked questions

What is N-Methylcyclopropanamine used for in research?

N-Methylcyclopropanamine is primarily used as a synthetic building block in medicinal chemistry and agrochemical research. Its cyclopropyl ring is a well-recognized bioisostere that can improve metabolic stability and modulate lipophilicity of drug candidates. It participates in amide coupling, reductive amination, nucleophilic substitution, and heterocycle synthesis reactions.

How should N-Methylcyclopropanamine be stored to maintain stability?

The compound should be stored in a tightly sealed container at controlled room temperature (15–25 °C), away from moisture, strong oxidizers, and strong acids. It should be kept in a dedicated flammables cabinet. Always refer to the product-specific Certificate of Analysis and Safety Data Sheet for the most up-to-date storage recommendations.

What safety precautions are required when handling N-Methylcyclopropanamine?

Handling should be performed in a fume hood with appropriate PPE, including nitrile gloves, safety goggles, and a lab coat. The compound is flammable, so ignition sources must be eliminated. In case of skin or eye contact, rinse immediately with large amounts of water and seek medical attention. Always consult the SDS before use.

What purity grade of N-Methylcyclopropanamine is suitable for pharmaceutical synthesis?

For most pharmaceutical synthetic applications, a purity of ≥97% (GC) is generally considered adequate for building-block and intermediate use. For more demanding applications such as reference standards or GMP-adjacent work, higher purity grades should be specified. Contact Aladdin Scientific's technical team to discuss requirements.

Is N-Methylcyclopropanamine the same as N-methyl-cyclopropylamine?

Yes, N-Methylcyclopropanamine and N-methyl-cyclopropylamine are different names for the same compound. The IUPAC-preferred name is N-methylcyclopropanamine, while N-methyl-cyclopropylamine is a common alternative name used in literature and supplier catalogues. Both refer to the secondary amine with molecular formula C4H9N.

References

1. March, J. Advanced Organic Chemistry: Reactions, Mechanisms, and Structure. 4th ed. Wiley-Interscience, 1992. (General reference for amine reactivity and amide coupling.)
2. Ritchie, T. J.; Macdonald, S. J. F. The impact of aromatic ring count on compound developability: are too many rings a liability? Drug Discovery Today, 2009, 14(21–22), 1011–1020. (Background on cyclopropyl as a bioisostere in drug discovery.) doi:10.1016/j.drudis.2009.07.014
3. Aladdin Scientific. Product Page: N-Methylcyclopropanamine, SKU N725431. (Primary product source for specifications.)

Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.