Novel Dihydroxybenzene Derivatives and Antiprotozoal Agent Comprising Same as Active Ingredient
申请人:Saimoto Hiroyuki
公开号:US20130296422A1
公开(公告)日:2013-11-07
Novel compounds below are useful for preventing or treating diseases caused by protozoans. At least one of a compound represented by Formula (I)
(wherein, X represents a hydrogen atom or a halogen atom; R
1
represents a hydrogen atom; R
2
represents a hydrogen atom or a C
1-7
alkyl group; R
3
represents —CHO, —C(═O)R
5
, —COOR
5
(wherein R
5
represents a C
1-7
alkyl group), —CH
2
OH or —COOH; and R
4
represents a C
1-16
alkyl group having one or more substituents on a terminal carbon atom and/or non-terminal carbon atom(s), a C
2-16
alkenyl group having one or more substituents on a terminal carbon atom and/or non-terminal carbon atom(s), or a C
2-16
alkynyl group having one or more substituents on a terminal carbon atom and/or non-terminal carbon atom(s)), an optical isomer thereof, and a pharmaceutically acceptable salt is used.
The present invention provides a novel dihydroorotic acid dehydrogenase inhibitor which is applicable to various diseases. When used as an active ingredient, a compound represented by formula (I):
(wherein
X represents a halogen atom,
R
1
represents a hydrogen atom,
R
2
represents an alkyl group containing 1 to 7 carbon atoms,
R
3
represents —CHO, and
R
4
represents —CH
2
—CH═C(CH
3
)—R
0
(wherein R
0
represents an alkyl group containing 1 to 12 carbon atoms which may have a substituent on the terminal carbon and/or on a non-terminal carbon, etc.)),
an optical isomer thereof or a pharmaceutically acceptable salt thereof has a high inhibitory effect on dihydroorotic acid dehydrogenase and can be used as an immunosuppressive agent, a therapeutic agent for rheumatism, an anticancer agent, a therapeutic agent for graft rejection, an antiviral agent, an anti-
H. pylori
agent, a therapeutic agent for diabetes or the like.