Chemical Identity and Structural Features

6-Bromo-2-methyl-[1,2,4]triazolo[1,5-a]pyridine belongs to the triazolopyridine family of fused bicyclic heteroaromatics. The scaffold consists of a [1,2,4]triazole ring annulated to a pyridine ring in the [1,5-a] fusion mode, meaning that the nitrogen at position 1 of the triazole bridges to the 1-position of the pyridine. This arrangement produces a planar, fully aromatic 9-π-electron bicyclic system with favourable drug-likeness attributes including moderate polarity and the capacity for multiple hydrogen-bond interactions.

Two key substituents define this particular analogue: (1) a methyl group at C-2 of the triazole ring, which modestly increases lipophilicity and can serve as a metabolic soft spot or a handle for further elaboration; and (2) a bromine atom at C-6 of the pyridine ring, which acts as the primary reactive site for metal-catalysed cross-coupling chemistry. The combination of a nucleofugal halide and an electron-deficient heteroaromatic core makes this compound a versatile electrophilic building block.

Applications in Synthesis and Medicinal Chemistry

Cross-coupling reactions. The C-6 aryl bromide is well-suited to palladium-catalysed transformations, including Suzuki–Miyaura (aryl/heteroaryl boronic acid coupling), Buchwald–Hartwig (C–N bond formation with amines), Negishi, and Sonogashira reactions. These reactions enable rapid diversification of the triazolopyridine core, making this compound a powerful entry point for library synthesis in fragment-based and lead-optimisation campaigns.

Pharmacophore utility. The [1,2,4]triazolo[1,5-a]pyridine motif is a recognised bioisostere of purines and other fused heteroaromatics. Triazolopyridine-containing compounds have been investigated in the context of kinase inhibition, adenosine receptor modulation, and CNS-targeted programmes. Researchers should consult primary literature to identify specific biological targets relevant to their programme before selecting this scaffold.

Fragment and building-block use. With a molecular weight well below 300 g/mol and multiple vectors for elaboration (C-2 methyl, C-6 position post-coupling), this compound meets criteria for use as a fragment or intermediate in fragment-based drug discovery (FBDD) workflows.

Handling, Storage, and Safety Guidelines

Personal protective equipment (PPE). When handling 6-Bromo-2-methyl-[1,2,4]triazolo[1,5-a]pyridine, wear appropriate PPE including nitrile gloves, a laboratory coat, and safety glasses. If fine particulate dust is generated during weighing, use a dust mask or conduct operations in a ventilated enclosure.

Storage conditions. Store the compound in a tightly sealed container in a cool (2–8 °C recommended for long-term stability; room temperature acceptable for short-term use), dry, and well-ventilated location away from direct light, heat sources, and incompatible materials such as strong oxidisers and strong bases. Moisture ingress can degrade halogenated heteroaromatics over time; use desiccant or inert-atmosphere storage where appropriate.

Handling precautions. Avoid generating dust. Avoid contact with eyes, skin, and mucous membranes. In the event of skin or eye contact, flush thoroughly with water and seek medical advice. Ensure adequate ventilation in the working area. Dispose of waste in accordance with local institutional and regulatory requirements for halogenated organic compounds.

Note: A full Safety Data Sheet (SDS) should be consulted prior to use. Specific hazard classifications and GHS pictograms for this compound should be verified from the SDS provided with SKU B194742 or from the Aladdin Scientific product page.

Quality, Purity, and Analytical Verification

Certificate of Analysis (CoA). Each lot of 6-Bromo-2-methyl-[1,2,4]triazolo[1,5-a]pyridine (SKU B194742) from Aladdin Scientific is accompanied by a Certificate of Analysis specifying purity, appearance, and analytical data. Researchers should download the lot-specific CoA from the Aladdin Scientific website or request it from technical support before committing the material to critical experiments.

Purity assessment methods. High-performance liquid chromatography (HPLC) is the standard technique for purity determination of this class of heterocyclic building blocks. Nuclear magnetic resonance (NMR) spectroscopy (¹H and ¹³C) provides structural confirmation, while high-resolution mass spectrometry (HRMS) confirms the molecular formula. The characteristic isotope pattern of bromine (approximately 1:1 ratio of ⁷⁹Br/⁸¹Br) provides a reliable spectroscopic signature for identity confirmation by mass spectrometry.

Acceptance criteria. For most synthetic and biological applications, HPLC purity ≥95% is considered acceptable. For highly sensitive biochemical assays or reference standard use, ≥98% purity may be required. Verify the purity grade available for SKU B194742 on the product page and CoA.

Ordering and Procurement Information

6-Bromo-2-methyl-[1,2,4]triazolo[1,5-a]pyridine is available from Aladdin Scientific under SKU B194742. To place an order, visit the Aladdin Scientific website, search by SKU or product name, and select the desired pack size and quantity. For bulk quantities, custom pack sizes, or special purity grades, contact the Aladdin Scientific sales team directly.

Shipping and storage on receipt. Upon receipt, inspect the package for integrity. Transfer the compound promptly to the recommended storage conditions described in the Handling section above. Record the lot number and receipt date for traceability.

Returns and quality issues. If the material does not meet the specifications stated on the CoA, contact Aladdin Scientific customer service with the lot number and a description of the non-conformance. Refer to the Aladdin Scientific returns and refunds policy for eligibility criteria and procedures.