The present invention provides industrially suitable processes for preparing intermediates in the production of substituted polycyclic pyridone derivatives having a cap-dependent endonuclease inhibitory activity.
In the process as shown below, wherein each symbol is as defined in the specification, an optically active substituted tricyclic pyridone derivative of the formula (VII) is obtained in high yield and high enantioselectivity by subjecting a compound of the formula (III) or (VI) to intramolecular cyclization with controlling stereochemistry to obtain a compound of the formula (IV) having a removable functional group on an asymmetric carbon, and then removing the functional group thereof.
本发明提供了适合工业化生产的工艺,用于制备具有帽依赖性内切酶抑制活性的取代多环
吡啶酮衍
生物的中间体。
在下图所示的工艺中(其中各符号如说明书中所定义),通过将式(III)或(VI)化合物进行立体
化学控制的分子内环化,以获得在不对称碳上具有可去除官能团的式(IV)化合物,然后去除其官能团,从而以高产率和高对映选择性获得光学活性的式(VII)取代的
三环吡啶酮衍
生物。