The synthesis of targeted cancer therapeutics is a highly specialized field that relies on a deep understanding of chemical structures and reactions. Tert-Butyl 4-Bromo-2-(1H-pyrrolo[2,3-b]pyridin-5-yloxy)benzoate, identified by CAS number 1628047-84-6, is a crucial building block in the production of Venetoclax (ABT-199), a significant advancement in oncology. This article explores the essential chemical properties of this intermediate, providing valuable insights for chemists, researchers, and procurement professionals.

Key Chemical Identifiers and Properties

The chemical name for this intermediate is tert-Butyl 4-Bromo-2-(1H-pyrrolo[2,3-b]pyridin-5-yloxy)benzoate. Its molecular formula is C18H17BrN2O3, and it has a molecular weight of 389.24 g/mol. These fundamental identifiers are critical for literature searches, experimental design, and regulatory submissions. The compound is characterized by its distinct structure, featuring a brominated benzoic acid ester linked to a heterocyclic pyrrolo[2,3-b]pyridine moiety via an ether linkage. This specific arrangement of atoms and functional groups dictates its reactivity and utility in complex organic synthesis.

Physical Characteristics and Specification Standards

From a physical standpoint, tert-Butyl 4-Bromo-2-(1H-pyrrolo[2,3-b]pyridin-5-yloxy)benzoate is typically supplied as a white to off-white powder. This consistent physical appearance is a first indicator of product quality. Manufacturers commonly adhere to purity specifications of ≥98.0% for this intermediate. Achieving and maintaining such high purity requires sophisticated manufacturing processes, including precise reaction control and effective purification techniques. Buyers should always verify these specifications through the manufacturer's Certificate of Analysis (CoA).

Role in Venetoclax Synthesis and Beyond

As a critical intermediate, CAS 1628047-84-6 plays an indispensable role in the multi-step synthesis of Venetoclax. Venetoclax is a potent and selective inhibitor of the BCL-2 protein, which is overexpressed in certain cancer cells and prevents apoptosis. By blocking BCL-2, Venetoclax reactivates the cell's natural death process. The efficient synthesis of Venetoclax relies on the predictable reactivity and high purity of its precursors. Beyond Venetoclax, the structural features of tert-Butyl 4-Bromo-2-(1H-pyrrolo[2,3-b]pyridin-5-yloxy)benzoate may also make it a valuable starting material or intermediate in the research and development of other novel organic compounds with potential therapeutic applications.

Procurement and Supplier Considerations

When seeking to buy tert-Butyl 4-Bromo-2-(1H-pyrrolo[2,3-b]pyridin-5-yloxy)benzoate, it is imperative to partner with suppliers who can consistently deliver material meeting these precise chemical and physical specifications. Reputable manufacturers, particularly those operating in China, offer competitive pricing and reliable global distribution. Engaging with suppliers who provide detailed technical data sheets, safety information, and are capable of handling inquiries regarding custom synthesis or bulk orders is highly recommended.

Conclusion

Understanding the detailed chemical properties of intermediates like tert-Butyl 4-Bromo-2-(1H-pyrrolo[2,3-b]pyridin-5-yloxy)benzoate (CAS 1628047-84-6) is fundamental for successful pharmaceutical development. Its role in synthesizing Venetoclax highlights the importance of high-purity intermediates and reliable chemical manufacturing partners in bringing life-saving treatments to market.