A compound which specifically binds to a receptor of NR1/ NR2B, and is used as a NR2B receptor antagonist is provided.
It has been found out that a piperazine derivative represented by the formula (I) binds specifically to a receptor of NR1/NR2B, and is used as a NR2B receptor antagonist.
A compound represented by:
wherein R1 is each independently C1-C3 alkyl or the like, m is an integer of 0 to 4, X is -N(R4)-C(=O)-C(=O)-, -N(R4)-(CR5R6)p-C(=O)-, -N(R4)-C(-O)-(CR7R8)q- or -C(=O)-N(R4)-(CR7R8)q-, p and q are each independently an integer of 1 to 3, R4, R5, R6, R7 and R8 are each independently a hydrogen atom or lower alkyl, A1 is benzoxazolinone or the like, and A2 is optionally substituted phenyl or the like, or a pharmaceutically acceptable salt or a solvate thereof.
A compound which specifically binds to a receptor of NR1/NR2B, and is used as a NR2B receptor antagonist is provided.
It has been found out that a piperazine derivative represented by the formula (I) binds specifically to a receptor of NR1/NR2B, and is used as a NR2B receptor antagonist.
A compound represented by:
wherein R
1
is each independently C1-C3 alkyl or the like, m is an integer of 0 to 4, X is —N(R
4
)—C(═O)—C(═O)—, —N(R
4
)—(CR
5
R
6
)
p
—C(═O)—, —N(R
4
)—C(═O)—(CR
7
R
8
)
q
— or —C(═O)—N(R
4
)—(CR
7
R
8
)
q
—, p and q are each independently an integer of 1 to 3, R
4
, R
5
, R
6
, R
7
and R
8
are each independently a hydrogen atom or lower alkyl, A
1
is benzoxazolinone or the like, and A
2
is optionally substituted phenyl or the like,
or a pharmaceutically acceptable salt or a solvate thereof.