(R)-3-(Boc-amino)pyrrolidine: Handling & Application Guide

(R)-3-(Boc-amino)pyrrolidine is an enantiopure, Boc-protected secondary amine building block widely used in asymmetric synthesis, medicinal chemistry, and the preparation of pharmacologically active compounds requiring a defined chiral pyrrolidine scaffold.

Chemical Name

(R)-tert-Butyl pyrrolidin-3-ylcarbamate

SKU

B121659

Molecular Formula

C9H18N2O2

Molecular Weight

186.25 g/mol

Stereochemistry

R-configuration at C-3 of the pyrrolidine ring

Key Functional Groups

Boc-protected amine (N-Boc), secondary amine (NH)

Recommended Storage

Cool, dry place; protect from moisture and light

Chemical Identity and Structural Features

(R)-3-(Boc-amino)pyrrolidine (SKU B121659) is a five-membered nitrogen heterocycle bearing a tert-butoxycarbonyl (Boc)-protected amine at the 3-position with defined R-stereochemistry. Its molecular formula is C₉H₁₈N₂O₂ and molecular weight is 186.25 g/mol. The compound features two nitrogen atoms: the ring nitrogen (NH of the pyrrolidine), which is nucleophilic and available for further functionalization, and the exocyclic amine nitrogen, which is masked by the Boc protecting group.

The Boc group provides orthogonal protection, allowing selective manipulation of the ring NH under mild conditions. The fixed R-configuration at C-3 makes this compound a valuable enantiopure starting material, ensuring stereochemical fidelity in downstream synthetic transformations. Researchers should verify the enantiomeric excess (ee) value on the certificate of analysis (CoA) prior to use in asymmetric synthesis workflows.

Synthetic Applications and Use Cases

(R)-3-(Boc-amino)pyrrolidine serves as a versatile chiral synthon in multiple areas of chemical research:

• Medicinal chemistry: The pyrrolidine scaffold is a privileged structure found in numerous bioactive molecules and approved drugs. This building block allows rapid incorporation of a chiral, basic nitrogen center into drug candidates during structure–activity relationship (SAR) studies.
• Fragment-based drug discovery: The compact, enantiopure pyrrolidine framework is well suited for fragment library construction and lead optimization campaigns targeting CNS, oncology, and infectious disease indications.
• N-Alkylation and acylation: The free pyrrolidine NH can undergo selective alkylation, acylation, sulfonylation, or reductive amination to install diverse substituents while the Boc group remains intact.
• Boc deprotection: Treatment with acids such as trifluoroacetic acid (TFA) in dichloromethane or HCl in dioxane cleanly removes the Boc group to unmask the primary amine, enabling further derivatization.
• Cross-coupling and cyclization: The secondary amine can participate in transition-metal-catalyzed C–N coupling reactions (e.g., Buchwald–Hartwig amination) as a coupling partner.

Researchers are encouraged to confirm reaction conditions in small-scale pilot experiments before scale-up to ensure compatibility with their specific substrate and reagent systems.

Safe Handling, Storage, and Stability

Personal protective equipment (PPE): Handle (R)-3-(Boc-amino)pyrrolidine wearing nitrile gloves, a laboratory coat, and safety glasses. Work in a well-ventilated area or fume hood, as amine-containing compounds may be irritating to the respiratory tract, skin, and eyes.

Storage: Store the compound in a tightly sealed container in a cool, dry location, protected from light and moisture. Moisture ingress can lead to hydrolysis of the Boc group over time, compromising purity and enantiopurity. Refrigerated storage (2–8 °C) is generally recommended for long-term stability; consult the product CoA for lot-specific guidance.

Stability: The Boc group is stable under neutral and basic conditions but is labile under acidic conditions and at elevated temperatures. Avoid prolonged exposure to strong acids, oxidizing agents, or heat. Solutions should be prepared fresh or stored under inert atmosphere (nitrogen or argon) to minimize degradation.

Disposal: Dispose of waste material in accordance with local, national, and institutional regulations governing amine-containing organic chemicals. Consult the Safety Data Sheet (SDS) for complete hazard information before use.

Quality Assurance and Ordering Information

Aladdin Scientific supplies (R)-3-(Boc-amino)pyrrolidine under SKU B121659. Each lot is accompanied by a Certificate of Analysis (CoA) documenting identity, purity, and, where applicable, enantiomeric excess. Researchers should review the CoA upon receipt and confirm that purity and ee values meet the requirements of their specific application.

Recommended pre-use checks:

• Verify appearance (typically a white to off-white solid or viscous liquid) and confirm absence of discoloration or unusual odor that may indicate degradation.
• Confirm lot-specific purity by HPLC or NMR if the application is sensitive to impurity levels.
• Check ee by chiral HPLC if absolute stereochemical integrity is critical to the research outcome.

For bulk quantities, custom synthesis, or technical inquiries, contact Aladdin Scientific's technical support team. Procurement teams can place orders directly through the Aladdin Scientific website or authorized distributors.

Frequently asked questions

What is the difference between (R)- and (S)-3-(Boc-amino)pyrrolidine, and does stereochemistry matter for my application?

(R)- and (S)-3-(Boc-amino)pyrrolidine are enantiomers: mirror-image compounds with identical physical properties (melting point, solubility) but opposite optical rotation and potentially very different biological activity. In medicinal chemistry and asymmetric synthesis, using the correct enantiomer is critical because enzymes and receptors are chiral; the wrong enantiomer may be inactive or even toxic. Always confirm which stereoisomer your application requires before ordering.

How do I remove the Boc protecting group from (R)-3-(Boc-amino)pyrrolidine?

The Boc group is most commonly removed by treatment with trifluoroacetic acid (TFA, typically 20–50% v/v) in dichloromethane at room temperature for 30–60 minutes, or with 4 M HCl in dioxane. After deprotection, the free amine is obtained as its TFA or HCl salt, which can be neutralized with base (e.g., triethylamine or Hünig's base) if the free amine form is required. Optimize reaction time and acid concentration in a pilot experiment before scale-up.

What solvents are suitable for dissolving (R)-3-(Boc-amino)pyrrolidine?

(R)-3-(Boc-amino)pyrrolidine is generally soluble in common polar organic solvents including dichloromethane, methanol, ethanol, tetrahydrofuran (THF), dimethylformamide (DMF), and dimethyl sulfoxide (DMSO). It has limited solubility in non-polar solvents such as hexane. Solubility in water may be moderate due to the hydrophobic Boc group. Always test solubility empirically with your specific lot before large-scale use.

Is (R)-3-(Boc-amino)pyrrolidine stable at room temperature, and how should it be stored long-term?

The compound is relatively stable at room temperature for short periods when kept in a sealed container away from moisture and light. For long-term storage, refrigeration at 2–8 °C under inert atmosphere is recommended to preserve both chemical purity and enantiomeric excess. Repeated freeze–thaw cycles should be minimized. Always check the CoA for lot-specific stability data.

References

1. Greene, T. W.; Wuts, P. G. M. Protective Groups in Organic Synthesis, 4th ed.; Wiley-Interscience: New York, 2007. (Reference for Boc protection/deprotection methodology.)
2. Roughley, S. D.; Jordan, A. M. The Medicinal Chemist's Toolbox: An Analysis of Reactions Used in the Pursuit of Drug Candidates. J. Med. Chem. 2011, 54, 3451–3479. (Context for pyrrolidine use in drug discovery.) doi:10.1021/jm200187y
3. Lovering, F.; Bikker, J.; Humblet, C. Escape from Flatland: Increasing Saturation as an Approach to Improving Clinical Success. J. Med. Chem. 2009, 52, 6752–6756. (Supports use of saturated N-heterocycles including pyrrolidines in drug discovery.) doi:10.1021/jm901241e

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