中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | ethyl (3R,4S,5R)-5-N-benzylideneamino-3-(1-ethylpropoxy)-4-hydroxy-1-cyclohexene-1-carboxylate | 332047-17-3 | C21H29NO4 | 359.466 |
—— | ethyl (3R,4S,5R)-5-amino-3-(1-ethylpropoxy)-4-hydroxy-1-cyclohexene-1-carboxylate | 312904-12-4 | C14H25NO4 | 271.357 |
—— | ethyl (3R,4S,5R)-5-N-allyllamino-3-(1-ethylpropoxy)-4-hydroxy-1-cyclohexene-1-carboxylate | 312904-11-3 | C17H29NO4 | 311.422 |
The evolution of the synthesis of oseltamivir phosphate (Tamiflu®), used for the oral treatment and prevention of influenza virus infections (viral flu) is described. Oseltamivir phosphate is the ethyl ester prodrug of the corresponding acid, a potent and selective inhibitor of influenza neuraminidase. The discovery chemistry route and scalable routes used for kilo laboratory production as well as the technical access to oseltamivir phosphate from (–)-shikimic acid proceeding via a synthetically well-developed epoxide building block followed by azide transformations are reviewed. Synthesis and process research investigations towards azide-free conversions of the key epoxide building block to oseltamivir phosphate are discussed. The search for new routes to oseltamivir phosphate independent of shikimic acid including Diels-Alder approaches and transformations of aromatic rings employing a desymmetrization concept are presented in view of large-scale production requirements.