Crystallizing Fats? Development of a Scalable, Chromatography-Free Synthesis of Cationic Lipids
作者:Gregory L. Beutner、Sloan Ayers、Shawn Brueggemeier、Patricia Cho、Ronald Carrasquillo-Flores、Kathleen Kelly、Federico Lora Gonzalez、Jonathan Marshall、Subha Mukherjee、Jun Qiu、Michael J. Smith
DOI:10.1021/acs.oprd.0c00374
日期:2020.11.20
Research on the development of scalable routes to pharmaceutical intermediates typically proceeds from explorations of the chemistry to the identification of robust procedures for isolation. Although this order of investigation works well for typical small molecules possessing favorable physical properties and, therefore, numerous options for isolation, this is not always the case. The synthesis of cationic lipids is an exception to the rule and challenges this logic. Supported by extensive solubility and salt screening, we engaged in a reverse development effort, focusing first on identifying isolation conditions and then using that information to select appropriate chemistry. This strategy allowed for development of a robust, chromatography-free route to the cationic lipids of interest that was implemented at kilogram scale with quantifiable improvements to yield and efficiency when compared to the original route.