Overview and Chemical Properties

3,5-Bis(trifluoromethyl)benzylamine (SKU: B1506229) is a primary benzylic amine featuring two strongly electron-withdrawing trifluoromethyl (CF3) groups at the 3- and 5-positions of the aromatic ring. The presence of two CF3 substituents makes the aromatic ring highly electron-deficient, which modulates the basicity of the amine relative to unsubstituted benzylamine and imparts excellent metabolic stability and lipophilicity to derivatives — properties highly valued in medicinal chemistry and agrochemical lead optimization.

The compound is a liquid at room temperature with characteristic amine odor. Its molecular formula is C9H7F6N, with a molecular weight of approximately 243.15 g/mol. The benzylic –CH2NH2 moiety retains good nucleophilicity for synthetic transformations despite the electron-withdrawing ring substituents.

Synthetic Applications and Reactions

3,5-Bis(trifluoromethyl)benzylamine is a broadly applicable building block in synthetic organic chemistry. Its primary amine functionality participates in the following key transformations:

• Amide bond formation: Reacts with activated carboxylic acid derivatives (acid chlorides, anhydrides, NHS esters) or via standard coupling reagents (EDC, HATU, DCC) to yield fluorinated amides useful in pharmaceutical libraries.
• Reductive amination: Condenses with aldehydes and ketones in the presence of reducing agents (NaBH3CN, NaBH(OAc)3) to give secondary and tertiary fluorinated amines.
• Urea and thiourea synthesis: Reacts with isocyanates or thioisocyanates to furnish bis-CF3-substituted ureas and thioureas, scaffolds common in drug discovery and agrochemical programs.
• Sulfonamide formation: Treatment with sulfonyl chlorides provides sulfonamides with enhanced metabolic stability conferred by the fluorinated aryl group.
• Imine and Schiff base formation: The amine condenses with carbonyl compounds to give imines, which can be further reduced or used directly as ligands in asymmetric catalysis.

The strongly electron-withdrawing CF3 groups slow oxidative metabolism at the aromatic ring, making derivatives of this amine particularly attractive for drug candidate optimization.

Handling, Safety, and Storage

Personal Protective Equipment (PPE): Always handle 3,5-Bis(trifluoromethyl)benzylamine in a well-ventilated fume hood. Wear chemical-resistant gloves (nitrile or neoprene), safety goggles, and a lab coat. Avoid inhalation of vapors.

Skin and Eye Contact: As a primary amine, this compound is corrosive and irritating to skin, eyes, and mucous membranes. In case of skin contact, wash thoroughly with soap and water. For eye contact, flush immediately with copious water and seek medical attention.

Storage: Store in a tightly closed container in a cool (ideally 2–8 °C or as indicated on the label), dry location away from light, heat, and ignition sources. Keep away from strong oxidizers, strong acids, and reactive electrophiles. Ensure storage area is well ventilated.

Disposal: Dispose of waste in accordance with local, regional, and national regulations for fluorinated organic compounds. Do not pour down the drain without appropriate treatment.

Always consult the current Safety Data Sheet (SDS) provided with the product before use.

Ordering, Purity, and Specifications

Aladdin Scientific offers 3,5-Bis(trifluoromethyl)benzylamine under catalog number B1506229. Researchers should verify the current purity specification, available pack sizes, and lot-specific certificate of analysis (CoA) on the product detail page or by contacting technical support.

Typical purity: Research-grade material is typically ≥95% or ≥98% by GC or titration; confirm the exact specification on the CoA for each lot before use in quantitative assays or reference standard applications.

Available formats: Contact Aladdin customer service for information on bulk quantities, custom packaging, or alternative grades if standard pack sizes do not meet your requirements.

Quality documentation: A certificate of analysis including purity, identity (NMR or GC), and lot number is available upon request or can be downloaded from the product page.

Troubleshooting Common Lab Issues

Issue: Incomplete amide coupling reaction.
Possible causes include insufficient activation of the carboxylic acid partner, steric hindrance, or moisture interference. Ensure coupling reagents (e.g., HATU, EDC) are fresh and reactions are conducted under inert atmosphere when moisture-sensitive. Adding a base such as DIPEA or triethylamine at 2–3 equivalents is typically recommended.

Issue: Product discoloration or darkening on storage.
Primary amines are susceptible to oxidation and reaction with CO2 and moisture to form carbamates or darkened oligomeric species. Store under inert gas (N2 or Ar) in a tightly sealed vial at low temperature to minimize degradation.

Issue: Low yield in reductive amination.
Ensure the imine intermediate is fully formed before adding the reducing agent. Molecular sieves (3Å or 4Å) can help drive imine formation by removing water. Select the appropriate reducing agent for selectivity (NaBH3CN for selectivity; NaBH(OAc)3 for mild conditions).

Issue: Detecting trace impurities.
GC-MS and 1H/19F NMR are recommended analytical methods. The 19F NMR is particularly sensitive for detecting fluorinated impurities or solvent signals from CF3-containing species.