申请人:Davidson Alan Hornsby
公开号:US20090118311A1
公开(公告)日:2009-05-07
Compounds of formula (I) or (II) are dihydrofolate reductase inhibitors, useful for the treatment of, for example, cell proliferative diseases:
wherein A and D are independently —CHR
7
— or —NR
7
—; E and G are independently ═CR
7
— or ═N—; each R
6
independently represents hydrogen or —OR
7
; R
7
is hydrogen or C
1
-C
6
alkyl; R
1
is a carboxylic acid group (—COOH), or an ester group which is hydrolysable by one or more intracellular carboxylesterase enzymes to a carboxylic acid group; R
2
is the side chain of a natural or non-natural alpha amino acid which does not contain a carboxyl, or carboxyl ester group; Y is a bond, —C(═O)—, —S(═O)
2
—, —C(═O)NR
3
—, —C(═S)—NR
3
, —C(═NH)NR
3
or —S(═O)
2
NR
3
— wherein R
3
is hydrogen or optionally substituted C
1
-C
6
alkyl; L
1
is a divalent radical of formula -(Alk
1
)
m
(Q)
n
(Alk
2
)
p
- wherein m, n and p are independently 0 or 1, and Q, Alk
1
and Alk
2
are as defined in the claims; X
1
represents a bond; —C(═O); or —S(═O)
2
—; —NR
4
C(═O)—, —C(═O)NR
4
—, —NR
4
C(═O)NR
5
—, —NR
4
S(═O)
2
—, or —S(═O)
2
NR
4
— wherein R
4
and R
5
are independently hydrogen or optionally substituted C
1
-C
6
alkyl; and z is 0 or 1.
式(I)或(II)的化合物是二氢叶酸还原酶抑制剂,适用于治疗细胞增殖性疾病,其中A和D独立地为—CHR7—或—NR7—;E和G独立地为═CR7—或═N—;每个R6独立地表示氢或—OR7;R7是氢或C1-C6烷基;R1是羧酸基(—COOH),或者是可由一个或多个细胞内羧酸酯酶水解为羧酸基的酯基;R2是天然或非天然α氨基酸的侧链,不含羧基或羧酯基;Y是键,—C(═O)—、—S(═O)2—、—C(═O)NR3—、—C(═S)—NR3、—C(═NH)NR3或—S(═O)2NR3—其中R3是氢或可选取代的C1-C6烷基;L1是式-(Alk1)m(Q)n(Alk2)p-的二价基团,其中m、n和p独立地为0或1,而Q、Alk1和Alk2如权利要求所定义;X1表示键;—C(═O);或—S(═O)2—;—NR4C(═O)—、—C(═O)NR4—、—NR4C(═O)NR5—、—NR4S(═O)2—或—S(═O)2NR4—其中R4和R5独立地为氢或可选取代的C1-C6烷基;z为0或1。