What Is 6,8-Dichloroimidazo[1,2-a]pyrazine?

6,8-Dichloroimidazo[1,2-a]pyrazine (Aladdin SKU D735099) is a bicyclic heteroaromatic compound formed by the fusion of an imidazole ring with a pyrazine ring at the [1,2-a] positions. Two chlorine atoms are positioned at C-6 and C-8 of the pyrazine portion of the scaffold, making this molecule a highly reactive and versatile intermediate in synthetic chemistry.

The imidazo[1,2-a]pyrazine core is a privileged heterocyclic scaffold in medicinal chemistry, found in or used to prepare numerous biologically active compounds. The presence of two electrophilic chlorine substituents provides multiple handles for derivatization via palladium-catalyzed cross-coupling reactions (e.g., Suzuki, Buchwald-Hartwig) or nucleophilic aromatic substitution (SNAr), enabling rapid generation of diverse analogue libraries.

Chemical Properties and Structural Features

The imidazo[1,2-a]pyrazine bicyclic system is a fully aromatic, planar structure with a nitrogen-rich framework. The two ring-nitrogen atoms within the pyrazine ring and the bridgehead nitrogen shared with the imidazole ring collectively lower the electron density of the ring system, activating the C-6 and C-8 chlorines toward nucleophilic displacement.

Key chemical characteristics include:

• Electrophilic aromatic positions: C-6 and C-8 are electrophilically activated by the flanking ring nitrogens, facilitating SNAr reactions with amines, thiols, and alkoxides under mild conditions.
• Cross-coupling compatibility: Both chlorine atoms can participate in Pd(0)- or Pd(II)-catalyzed cross-coupling reactions, with C-8 typically exhibiting higher reactivity due to its peri relationship with the bridgehead nitrogen.
• Planarity and π-stacking ability: The rigid, planar scaffold supports intercalation and π–π stacking interactions, properties relevant to binding within enzyme active sites such as kinase ATP pockets.

Researchers should note that regioselectivity between C-6 and C-8 can be controlled by choice of nucleophile, catalyst, ligand, and reaction temperature. Optimization experiments are recommended when targeting mono-substituted products.

Handling, Storage, and Safety Considerations

As with most halogenated heteroaromatic compounds, 6,8-Dichloroimidazo[1,2-a]pyrazine should be handled with standard laboratory precautions:

• Personal protective equipment (PPE): Wear appropriate gloves, safety glasses, and a laboratory coat when handling this compound. Work in a well-ventilated fume hood.
• Storage: Store in a tightly sealed container in a cool, dry place away from moisture and light. Specific storage temperature recommendations should be confirmed from the product Certificate of Analysis (CoA) or Safety Data Sheet (SDS) available from Aladdin Scientific.
• Stability: Halogenated imidazopyrazines are generally stable under ambient conditions when stored correctly, but prolonged exposure to moisture or strong bases may promote hydrolysis or dehalogenation. Check the SDS for specific stability data.
• Disposal: Dispose of waste material in accordance with local regulations governing halogenated organic compounds.

For the most current and authoritative safety information, always refer to the official Aladdin Scientific SDS for SKU D735099 prior to use.

Applications in Synthesis and Drug Discovery

6,8-Dichloroimidazo[1,2-a]pyrazine serves as a key building block in several research contexts:

• Kinase inhibitor synthesis: The imidazo[1,2-a]pyrazine scaffold has been exploited in the design of kinase inhibitors targeting enzymes relevant to oncology and inflammation. The nitrogen-rich bicyclic core mimics purine geometry, enabling binding within ATP-competitive sites.
• Library synthesis: The two chlorine atoms allow sequential or simultaneous functionalization, making this compound ideal for parallel synthesis of compound libraries in lead optimization campaigns.
• Fragment-based drug design: The compact, heteroaromatic core makes 6,8-dichloroimidazo[1,2-a]pyrazine a useful fragment or fragment-elaboration starting point in fragment-based lead discovery (FBLD) programs.
• Heterocyclic methodology development: Researchers in synthetic methodology use this compound to study regioselectivity, catalyst scope, and new reaction development in heteroaromatic functionalization.

Aladdin Scientific supplies D735099 to support discovery-phase research requiring reliable access to this specialized heterocyclic intermediate.

Ordering and Quality Information

6,8-Dichloroimidazo[1,2-a]pyrazine is available from Aladdin Scientific under catalog number D735099. When placing an order or evaluating the compound for your research, consider the following:

• Purity and specification: Refer to the current Certificate of Analysis (CoA) for lot-specific purity data, analytical method details (e.g., HPLC, NMR), and physical property confirmations. CoAs are available on request or via the Aladdin website.
• Pack sizes and pricing: Available pack sizes and current pricing can be found on the Aladdin Scientific product page for D735099. Contact your local Aladdin representative or use the online platform for volume pricing inquiries.
• Lead time and availability: Stock availability is subject to change. Contact Aladdin customer service for real-time stock status and estimated delivery timelines.
• Custom quantities: For bulk or custom quantities required for scale-up or partnership programs, contact Aladdin Scientific directly to discuss custom synthesis or bulk supply options.