Compounds of formula (I) are inhibitors of Polo-like kinases (PLKs), and are useful, inter alia, in the treatment of proliferative diseases:
wherein R
1
is hydrogen, or a (C
1
-C
6
)alkyl, (C
2
-C
6
)alkenyl, (C
2
-C
6
)alkynyl or (C
3
-C
6
)cycloalkyl group; R
2
is hydrogen, or an optionally substituted (C
1
-C
6
)alkyl, (C
2
-C
6
)alkenyl, (C
2
-C
6
)alkynyl or (C
3
-C
6
)cycloalkyl group; R
3
and R
3
′ are independently selected from hydrogen, —CN, hydroxyl, halogen, optionally substituted (C
1
-C
6
)alkyl, (C
2
-C
6
)alkenyl, (C
2
-C
6
)alkynyl or (C
3
-C
6
)cycloalkyl, —NR
6
R
7
or C
1
-C
4
alkoxy, wherein R
6
and R
7
are independently hydrogen or optionally substituted (C
1
-C
6
)alkyl; ring A is an optionally substituted mono- or bi-cyclic carbocyclic or heterocyclic ring or ring system having up to 12 ring atoms; T is a radical of formula (II)
R
4
R
5
CH—NH—Y-L
1
-X
1
— (II)
Wherein R
4
is a carboxylic acid group (—COOH), or an ester group which is hydrolysable by one or more intracellular esterase enzymes to a carboxylic acid group; R
5
is the side chain of a natural or non-natural alpha amino acid; and the linker radical —Y-L
1
-X
1
is as defined in the claims.
式(I)的化合物是Polo-like激酶(PLKs)的
抑制剂,可用于治疗增殖性疾病,其中R1是
氢,或(C1-C6)烷基,(C2-C6)
烯基,(C2-C6)炔基或(C3-C6)
环烷基;R2是
氢,或可选取代的(C1-C6)烷基,(C2-C6)
烯基,(C2-C6)炔基或(C3-C6)
环烷基;R3和R3'分别选自
氢,—CN,羟基,卤素,可选取代的(C1-C6)烷基,(C2-C6)
烯基,(C2-C6)炔基或(C3-C6)
环烷基,—NR6R7或C1-C4烷
氧基,其中R6和R7分别是
氢或可选取代的(C1-C6)烷基;环A是可选取代的具有最多12个环原子的单环或双环
碳环或杂环;T是式(II)的基团R4R5CH—NH—Y-L1-X1— (II)其中R4是
羧酸基(—COOH),或可被一个或多个细胞内
酯酶酶
水解为
羧酸基的
酯基;R5是
天然或非
天然α
氨基酸的侧链;连接基团—Y-L1-X1如权利要求所定义。