The present invention relates to heterocyclic compounds represented by the formula I or pharmaceutically acceptable salts thereof and antitumor agents containing the heterocyclic compounds as effective components:
wherein X represents nitrogen atom or CH; R
1
represents CH
n
F
3-n
(wherein n is 1 or 2), hydroxy C
1
-C
6
alkyl, NHR
6
[wherein R
6
represents hydrogen atom or COR (wherein R represents hydrogen atom, C
1
-C
6
alkyl or C
1
-C
6
alkoxy)]; R
2
represents morpholino (which may be substituted with one to four C
1
-C
6
alkyl), thiomorpholino, piperidino, pyrrolidinyl (which may be substituted with hydroxy C
1
-C
6
alkyl), oxazolidinyl (which may be substituted with one or two C
1
-C
6
alkyl) or tetrahydro-1,4-thiazin-1-oxo-4-yl; R
3
and R
4
each represent hydrogen atom or C
1
-C
6
alkyl; and R
5
represents hydrogen atom, amino or hydroxyl.
本发明涉及由式I表示的
杂环化合物或其药学上可接受的盐,以及含有该
杂环化合物作为有效成分的抗肿瘤剂:
其中X代表氮原子或CH;R1代表CHnF3-n(其中n为1或2),羟基C1-C6烷基,NHR6(其中R6代表氢原子或COR(其中R代表氢原子,C1-C6烷基或C1-C6烷氧基));R2代表
吗啡环(可以被取代为一到四个C1-C6烷基),
硫代
吗啡环,
哌啶环,
吡咯烷基(可以被羟基C1-C6烷基取代),
噁唑烷基(可以被一到两个C1-C6烷基取代)或四氢-1,4-
噻唑-1-氧-4-基;R3和R4各自代表氢原子或C1-C6烷基;R5代表氢原子,
氨基或羟基。