The present invention provides compounds of formula I
1
and pharmaceutically acceptable salts, wherein R1, R2, R3, R4, R5, X and Y have the meanings defined in the specification. The compounds have histone deacetylase (HDAC) inhibitory activity which is useful in cancer treatment. Also provided is a process for making a compound of formula I
by reacting a compound of formula III
2
with a compound of formula IV
3
wherein
A is a displaceable group and PG is a protecting group.
本发明提供了I1式化合物及其药学上可接受的盐,其中R1、R2、R3、R4、R5、X和Y在规范中有所定义。这些化合物具有组蛋白
去乙酰化酶(H
DAC)抑制活性,可用于癌症治疗。同时提供了一种通过将III2式化合物与IV3式化合物反应制备I式化合物的方法,其中A是可置换基团,
PG是保护基团。