A scalable asymmetric total synthesis of (−)-emetine, a natural product alkaloid from ipecac species and one of the main active ingredients in ipecac syrup used in emetics, has been accomplished. The synthetic route featured a total of 13 steps of highly efficient chemical reactions, including catalytic asymmetric allylation and an industrial deoxygenation of an aliphatic compound, which obviated the need for any chromatographic purification. (−)-Emetine·2HCl was obtained in 12% overall yield and over 93.2% HPLC purity. The synthesis was easily scaled up to 237.1 g and should be amenable to the production of larger quantities for ongoing drug development, while the compound is currently provided as natural ipecac syrup for a clinical use.
CITATION STYLE
Yamada, M., Azuma, K., Takizawa, I., Ejima, Y., Yamano, M., Satoh, K., … Tokuyama, H. (2023, February 17). Efficient and Scalable Asymmetric Total Synthesis of (−)-Emetine with Pharmaceutical Grade Quality; First Multigram Scale Synthesis. Organic Process Research and Development. American Chemical Society. https://doi.org/10.1021/acs.oprd.2c00355
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