A 9-hydroxy or 9-acyloxy group can be added to a pyridopyrimidinone ring structure by a process comprising acylating a compound of formula (5) under Vilsmeier-Haack or Friedel-Crafts conditions to form a compound (6); and transforming with a peroxo-compound to obtain the compound (1).
R represents hydrogen or a C1-C20 acyl group. The process is useful in the synthesis of paliperidone and derivatives.
通过在Vilsmeier-Haack或Friedel-Crafts条件下使式(5)的化合物酰基化以形成化合物(6),并使用过氧化合物转化以获得化合物(1),可以向
吡啶嘧啶酮环结构中添加9-羟基或9-酰氧基团。R代表氢或C1-C20酰基。该过程在
帕利哌酮及其衍
生物的合成中有用。