Compounds of formula (XII), are simultaneously halogenated in the 5 position and hydroxylated in the 4 position under lactonization, the halolactone is reacted with an amine to form a carboxamide, the halogen is replaced with azide, if necessary after the introduction of a hydroxy protecting group, the resulting azide is converted to a lactone, the lactone is amidated and then the azide converted to the amine group, in order to obtain compounds of formula (I) or a salt thereof.
公式(XII)的化合物在 lactonization 过程中,5 位同时被卤化,4 位被羟基化,卤代内
酯与胺反应形成羧
酰胺,卤素被
叠氮基取代,如有必要,在引入羟基保护基团后,将所得
叠氮化物转化为内
酯,内
酯进行
酰胺化,然后将
叠氮化物转化为胺基团,以获得公式(I)的化合物或其盐。