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image of Prediction of Chemistry of Cocrystallization and its Realistic Impact on the Enhancement of Solubility and Dissolution of Telmisartan: Molecular mechanics, ab initio and Descriptor Analysis

Abstract

Background

Cocrystal engineering of Telmisartan (TEL, a poorly soluble antihypertensive agent) has been undertaken to improve its solubility for the last few years. However, apart from a few handpicked attempts, none of the attempts have been able to improve its solubility by more than 3-5 fold and augment its dissolution by more than 80%.

Method

Addressing these shortcomings, herein, we have designed a novel Telmisartan-maleic acid (TM) cocrystal first by rational modelling with solvent-induced molecular mechanics (SIMM), based system optimization, descriptor analysis, and finally translating to cocrystals by wet grinding-gradient solvent evaporation method.

Results

Modelling revealed that binary solvent compared to single solvent imparted critical dynamics to seeding the co-crystallite and its structural archipelago. From single solvent to binary solvent, hydrogen bonding to nucleophilic addition of the coformer/s to the central ring revealed a crucial role in assigning the system geometry. The molecular descriptor plot of the generated subsystems (optimized by HF-SCF/def2-SVP method) showed that telmisartan: maleic acid molar ratio <=1:2 under ionizable conditions bear optimum hydrophilicity/hydrophobicity balance. Tonto-guided energy calculation revealed O--H and H--H as the predominant interactions for the crystal packing.

Conclusion

In translational research, our designed TM cocrystal (molar ratio 1:1.5 to 1:2, binary solvent dynamics) exhibited solubility improvement by more than 9 fold in water and showed to release about 92.19% of drugs within 2h (120 min), which superseded the previous reports in this field so far.

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2024-10-10
2025-02-17

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/content/journals/cac/10.2174/0115734110319081240904074952
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Prediction of Chemistry of Cocrystallization and its Realistic Impact on the Enhancement of Solubility and Dissolution of Telmisartan: Molecular mechanics, ab initio and Descriptor Analysis
Bentham Science Publishers ; https://doi.org/10.2174/0115734110319081240904074952
/content/journals/cac/10.2174/0115734110319081240904074952
/content/journals/cac/10.2174/0115734110319081240904074952
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  • Article Type:     Research Article
Keywords: molecular mechanics ; telmisartan ; solubility enhancement ; Cocrystals ; descriptor analysis ; ab initio

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