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 (I). 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条件下酰化式(5)化合物形成化合物(6),然后用过氧化物化合物转化以获得化合物(I),可以向
吡啶吡咯酮环结构中添加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
生物的合成中很有用。