Compounds of formula (II) are simultaneously halogenated in the 5 position and hydroxylated in the 4 position under lactonization, the halolactone is converted into a hydroxylactone and then the hydroxy group into a leaving group, the leaving group is replaced with azide, the lactone amidated and then the azide converted to the amine group, in order to obtain compounds of formula (I).
公式(II)的化合物在内酯化反应下同时在5位卤代并在4位羟基化,卤代内酯转化为羟基内酯,然后将羟基转化为离去基团,离去基团被
氮化物取代,内酯酰胺化,然后将
氮化物转化为胺基团,以获得公式(I)的化合物。