An improved process for making a compound B of the structure
wherein n, R1, R2, and R3 are as defined in the specification. Compound B can be used to make tubulysin analogs that are, in turn, useful as anti-cancer agents, particularly when deployed in an antibody-drug conjugate.
一种制造结构 B 化合物的改进工艺
其中 n、R1、R2 和 R3 如说明书中所定义。化合物 B 可用于制造 Tubulysin 类似物,而 Tubulysin 类似物又可用作抗癌剂,特别是在
抗体-药物共轭物中使用时。