5-Oxaprotoberberinones and 5-oxaprotoberberinium were synthesized as bioisosteres of protoberberines. 5-Oxaprotoberberinones were prepared by linking phenol with the isoquinolone ring of 3-phenolisoquinolones by methyleneoxy bridge, while the quaternary 5-oxaprotoberberinium salt was synthesized by reduction and oxidation of the lactam moiety of 5-oxaprotoberberinone.
合成了5-Oxaprotoberberinones和5-oxaprotoberberinium作为原小ber碱的
生物等排体。通过亚甲氧基桥将
苯酚与3-
苯酚异喹啉酮的
异喹诺酮环连接,制得5-氧杂小ino碱酮,而5-氧杂小in碱的内酰胺部分的还原和氧化反应可合成季
铵化的5-氧杂小ber碱盐。