Provided are a compound as represented by formula (D) and a preparation method therefor, where X
2
is a halogen, Pg is selected from H and an amino protecting group, such as Cbz, Boc, Fmoc, Alloc, Teoc, methoxycarbonyl or ethoxycarbonyl. Also provided are a synthesized intermediate compound of the formula (D) compound and a preparation method for the intermediate compound.
提供了一个由式(D)表示的化合物及其制备方法,其中X2是卤素,Pg选自H和
氨基保护基团,如Cbz、Boc、Fmoc、Alloc、Teoc、甲氧羰基或乙氧羰基。还提供了式(D)化合物的合成中间体化合物以及中间体化合物的制备方法。