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Uncovering abnormal changes in logP after fluorination using molecular dynamics simulations

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Abstract

The fluorination-induced changes in the logP (1-octanol/water partition coefficient) of ligands were examined by molecular dynamics simulations. The protocol and force field parameters were first evaluated by calculating the logP values for n-alkanes, and their monofluorinated and monochlorinated analogs. Then, the logP values of several test sets (1-butanol, 3-propyl-1H-indole, and analogs fluorinated at the terminal methyl group) were calculated. The calculated results agree well with experiment, and the root mean square error values are 0.61 and 0.68 log units for the GAFF and GAFF2 force fields, respectively. Finally, the logP estimation was extended to a drug molecule, TAK-438, for which fluorination-induced abnormal logP reduction has been observed experimentally. This abnormal change was qualitatively reproduced by the molecular dynamics simulations. We found that the abnormal logP reduction can be mainly attributed to the effect of fluorination-induced dipole change. Our results suggest that molecular simulation is a useful strategy to predict the fluorination-induced change in logP for drug discovery applications.

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Acknowledgements

The authors are grateful to Terufumi Takagi for carefully reading the manuscript and making valuable suggestions and comments. This study used computational resources of the HPCI system provided by the TSUBAME Grid Cluster at the Global Scientific Information and Computing Center of Tokyo Institute of Technology through the HPCI System Research Project (Project ID hp170026).

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  1. Kai Liu

    Present address: Drug Discovery Chemistry Laboratories, Neuroscience Drug Discovery Unit, Takeda Pharmaceutical Company Limited, 26-1, Muraoka-Higashi 2-chome, Fujisawa, Kanagawa, 251-8555, Japan

  2. Hironori Kokubo

    Present address: Chemistry, Research Division, Axcelead Drug Discovery Partners, Inc., 26-1, Muraoka-Higashi 2-chome, Fujisawa, Kanagawa, 251-8555, Japan

Authors and Affiliations

  1. Medicinal Chemistry Research Laboratories, Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26-1, Muraoka-Higashi 2-chome, Fujisawa, Kanagawa, 251-8555, Japan

    Kai Liu & Hironori Kokubo

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Liu, K., Kokubo, H. Uncovering abnormal changes in logP after fluorination using molecular dynamics simulations. J Comput Aided Mol Des 33, 345–356 (2019). https://doi.org/10.1007/s10822-018-0183-1

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