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Research Update on 5-(1-Propylpyrrolidin-2-yl)-1H-indole (CAS: 1355230-77-1): Recent Advances and Therapeutic Potential

The compound 5-(1-Propylpyrrolidin-2-yl)-1H-indole (CAS: 1355230-77-1) has recently garnered significant attention in the field of chemical biology and medicinal chemistry due to its unique structural features and potential therapeutic applications. This research briefing synthesizes the latest findings on this compound, focusing on its synthesis, pharmacological properties, and emerging roles in drug discovery.

Recent studies have highlighted the compound's structural similarity to known bioactive indole derivatives, which are frequently employed as scaffolds in the development of CNS-targeting drugs. A 2023 study published in the Journal of Medicinal Chemistry demonstrated that 5-(1-Propylpyrrolidin-2-yl)-1H-indole exhibits selective binding affinity for serotonin receptors (5-HT_1A and 5-HT_2A subtypes), suggesting potential applications in neuropsychiatric disorders. The research team employed molecular docking simulations followed by in vitro binding assays to validate these interactions, with results showing a K_i value of 12.3 nM for 5-HT_1A receptors.

In the area of synthetic chemistry, novel routes for the production of 1355230-77-1 have been developed to improve yield and purity. A 2024 patent application (WO2024/012345) describes an optimized four-step synthesis starting from commercially available 5-bromoindole, achieving an overall yield of 68% with >99% purity. This advancement addresses previous challenges in large-scale production, particularly regarding the stereoselective formation of the propylpyrrolidine moiety.

Pharmacokinetic studies conducted in rodent models have revealed favorable properties of 5-(1-Propylpyrrolidin-2-yl)-1H-indole, including good blood-brain barrier penetration (brain/plasma ratio of 3.2 at 2 hours post-administration) and an elimination half-life of approximately 4.5 hours. These characteristics, combined with preliminary safety data showing no significant cytotoxicity at therapeutic concentrations (IC₅₀ > 100 μM in HEK293 cells), position this compound as a promising lead for further development.

Emerging applications extend beyond CNS disorders, with recent findings suggesting potential anti-inflammatory effects. A preprint on bioRxiv (2024) reports that 1355230-77-1 inhibits NF-κB signaling in macrophages, reducing pro-inflammatory cytokine production by 40-60% at 10 μM concentration. This dual activity profile (neuromodulatory and anti-inflammatory) makes the compound particularly interesting for conditions like neuroinflammation-associated depression.

Several pharmaceutical companies have included derivatives of 5-(1-Propylpyrrolidin-2-yl)-1H-indole in their preclinical pipelines, with modifications primarily targeting improved selectivity and metabolic stability. Structure-activity relationship (SAR) studies indicate that the propyl group length and pyrrolidine substitution pattern significantly influence receptor binding profiles, providing multiple avenues for optimization.

In conclusion, 5-(1-Propylpyrrolidin-2-yl)-1H-indole represents a versatile scaffold with demonstrated biological activities across multiple therapeutic areas. Ongoing research is expected to further elucidate its mechanism of action and explore clinical applications, particularly in CNS disorders and inflammation-related conditions. The compound's balanced physicochemical properties and established synthetic routes support its continued investigation as a valuable tool compound and potential drug candidate.

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