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Recent Advances in the Application of 2-Chloro-3-fluoro-4-formylpyridine Hydrate (CAS: 1196156-07-6) in Chemical Biology and Pharmaceutical Research

2-Chloro-3-fluoro-4-formylpyridine hydrate (CAS: 1196156-07-6) is a versatile chemical intermediate that has garnered significant attention in recent pharmaceutical and chemical biology research. This compound, characterized by its reactive formyl group and halogen substituents, serves as a critical building block in the synthesis of various bioactive molecules. Recent studies have highlighted its utility in the development of kinase inhibitors, antimicrobial agents, and fluorescent probes, underscoring its importance in drug discovery and chemical biology.

A 2023 study published in the Journal of Medicinal Chemistry demonstrated the use of 2-Chloro-3-fluoro-4-formylpyridine hydrate as a key intermediate in the synthesis of novel Bruton's tyrosine kinase (BTK) inhibitors. The researchers utilized its formyl group for efficient Schiff base formation, enabling rapid diversification of the inhibitor scaffold. The resulting compounds showed improved selectivity profiles compared to existing BTK inhibitors, with IC50 values in the low nanomolar range against several B-cell lymphoma cell lines.

In antimicrobial research, a team from the University of Manchester reported in Bioorganic & Medicinal Chemistry Letters (2024) the development of fluoroquinolone derivatives incorporating 2-Chloro-3-fluoro-4-formylpyridine hydrate. The electron-withdrawing effects of the chloro and fluoro substituents were found to enhance bacterial topoisomerase inhibition, while the formyl group allowed for convenient conjugation with various amine-containing pharmacophores. These derivatives exhibited potent activity against multidrug-resistant Staphylococcus aureus strains, with MIC values as low as 0.25 μg/mL.

The compound's utility extends beyond therapeutic applications. A recent publication in Chemical Communications (2024) described its use in developing turn-on fluorescent probes for cysteine detection. Researchers at Tsinghua University exploited the reactivity of the formyl group toward thiols to create highly selective probes with large Stokes shifts (>100 nm) and detection limits below 50 nM. This work opens new possibilities for studying redox biology and developing diagnostic tools for oxidative stress-related diseases.

From a synthetic chemistry perspective, advances in the large-scale production of 2-Chloro-3-fluoro-4-formylpyridine hydrate have been reported. A 2023 patent (WO2023184567) disclosed an improved manufacturing process that achieves >90% yield while reducing hazardous byproducts. This development addresses previous challenges in scaling up production, making the compound more accessible for pharmaceutical applications.

Looking forward, the unique reactivity pattern of 2-Chloro-3-fluoro-4-formylpyridine hydrate continues to inspire innovative applications. Current research directions include its incorporation into PROTAC molecules (proteolysis-targeting chimeras) and as a starting material for DNA-encoded library synthesis. The compound's combination of halogen atoms for potential halogen bonding and an aldehyde for diverse conjugation chemistry makes it particularly valuable in these emerging areas of chemical biology.

• 628691-93-0(2-chloro-3-fluoropyridine-4-carboxylic acid)
• 922147-45-3(2-Chloro-3-Fluoro-4-Carboxypyridine)
• 628691-95-2(methyl 2-chloro-3-fluoropyridine-4-carboxylate)
• 881891-83-4(2-Chloro-5-fluoro-4-methylpyridine)
• 950691-52-8(6-Chloro-5-fluoropyridine-3-carbaldehyde)
• 881891-82-3(2-chloro-3-fluoro-4-methyl-pyridine)
• 329794-28-7(2-Chloro-3-fluoro-4-formylpyridine)
• 884494-54-6(2-Chloro-5-fluoroisonicotinaldehyde)
• 884494-74-0(2-Chloro-5-fluoroisonicotinic acid)
• 946127-54-4((2-Chloro-3-fluoropyridin-4-yl)methanol)