申请人:Tetraphase Pharmaceuticals, Inc.
公开号:US10618879B2
公开(公告)日:2020-04-14
Provided herein are improved processes for converting C7-amino-substituted tetracyclines to C7-fluoro-substituted tetracyclines, as well as intermediates produced by or used in these processes. In one embodiment, a thermal fluorination method is provided in which a suspension comprising a non-polar organic solvent and a C7-diazo-substituted tetracycline hexafluorophosphate, hexafluoroarsenate or hexafluorosilicate salt, or a salt, solvate or combination thereof, is heated to provide a C7-fluoro-substituted tetracycline, or salt, solvate or combination thereof. In another embodiment, a photolytic fluorination is provided in which a solution comprising an ionic liquid and a C7-diazo-substituted tetracycline tetrafluoroborate, hexafluorophosphate, hexafluoroarsenate or hexafluorosilicate salt, or a salt, solvate or combination thereof, is irradiated to provide a C7-fluoro-substituted tetracycline, or salt, solvate or combination thereof.
本文提供了将 C7-
氨基取代的
四环素转化为 C7-
氟取代的
四环素的改进工艺,以及由 这些工艺生产或在这些工艺中使用的中间体。在一个实施方案中,提供了一种热
氟化方法,将包含非极性有机溶剂和 C7-重氮取代的
四环素六氟磷酸盐、六
氟砷酸盐或六
氟硅酸盐或其盐、溶液或其组合的悬浮液加热,以提供 C7-
氟取代的
四环素或其盐、溶液或其组合。在另一个实施方案中,提供了一种光解
氟化方法,其中包含
离子液体和 C7-重氮取代的
四环素四
氟硼酸盐、
六氟磷酸酯、六
氟砷酸盐或六
氟硅酸盐或其盐、溶液或其组合的溶液经过辐照以提供 C7-
氟取代的
四环素或其盐、溶液或其组合。