A drug having a high affinity for benzodiazepine ω
3
receptors and showing curative and preventive effects for anxiety and depression, which comprises as the active ingredient, for example, a compound of the formula (1):
wherein R
1
and R
2
are independently a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, etc.,
R
3
and R
4
are independently a hydrogen atom, an optionally substituted alkyl group, etc.,
R
5
, R
6
, R
7
and R
8
are independently a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, etc.,
X is an oxygen atom, a sulfur atom, NR
10
, etc. (in which R
10
is a hydrogen atom, an optionally substituted alkyl group, etc.)
A drug having a high affinity for benzodiazepine ω3 receptors and showing curative and preventive effects for anxiety and depression, which comprises as the active ingredient, for example, a compound of the formula (1):
wherein R1 and R2 are independently a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, etc.,
R3 and R4 are independently a hydrogen atom, an optionally substituted alkyl group, etc.,
R5, R6, R7 and R8 are independently a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group, etc.,
X is an oxygen atom, a sulfur atom, NR10, etc. (in which R10 is a hydrogen atom, an optionally substituted alkyl group, etc.)
Design, synthesis and structure–activity relationship of novel tricyclic benzimidazolone derivatives as potent 18kDa translocator protein (TSPO) ligands
The 18kDatranslocatorprotein (TSPO) was identified as a discrete receptor for diazepam (1). Since TSPO in the central nervous system (CNS) is believed to regulate neurosteroids biosynthesis, selective TSPO ligands are expected to be useful in the treatment of psychiatric disorders. We synthesized three novel tricyclic benzimidazolone derivatives, and selected the dihydroimidazoquinolinone derivative