摘要:
A 1,2,3,4-tetrahydroquinoxalinedione derivative represented by the following formula (I) or salt thereof, an NMDA-glycine receptor and/or AMPA receptor antagonist or kainic acid neurotoxicity inhibitor containing the derivative or salt. In addition, a pharmaceutical composition comprising said compound and a pharmaceutically acceptable carrier. wherein symbols in the above formula represent the following meanings, respectively:
X: N, CH, R: an imidazolyl group or a di-lower alkylamino group, R 1 :
(1) a halogen atom, a nitro group, a cyano group, a carboxyl group, an amino group, a mono- or di-lower alkylamino group, a lower alkanoyl group, a lower alkylthio group, a lower alkylsulfinyl group, a lower alkylsulfonyl group or a carbamoyl group, (2) a lower alkyl group or lower alkoxyl group which may be substituted by a halogen atom, a carboxyl group or an aryl group, (3) a phenyloxy group which may be substituted by a lower alkoxycarbonyl group or a carboxyl group,
R 2 : a hydroxyl group, a lower alkoxyl group, an amino group or a mono- or di-lower alkylamino group, A: a lower alkylene group which may be substituted or a group represented by the formula -O-B-, and B: a lower alkylene group, with the proviso that the case wherein R represents an imidazolyl group, R 1 represents a cyano group, A represents an ethylene group and R 2 represents a hydroxyl group is excluded.
摘要:
Neuron protective agents on the basis of the inhibition of neuronotoxicity of kainic acid and compounds useful as such agents. Pyridothiazine derivatives represented by general formula (I) or pharmaceutically acceptable salts thereof and neuronotoxicity inhibitors containing as the active ingredient these compounds or pharmaceutically acceptable salts thereof, wherein A represents a pyridine ring; formula (II) represents formula (III) or formula (IV); and R , R , R , R and R are the same or different and each represents hydrogen, optionally substituted lower alkyl, cycloalkyl, alkenyl, aryl, carboxy or lower alkoxycarbonyl or does not exist, or R and R together form a nitrogenous heterocycle optionally having a nitrogen atom as another heteroatom, being fused with a benzene ring, or being substituted by lower alkyl.
摘要:
Neuron protective agents on the basis of the inhibition of neuronotoxicity of kainic acid and compounds useful as such agents. Pyridothiazine derivatives represented by general formula (I) or pharmaceutically acceptable salts thereof and neuronotoxicity inhibitors containing as the active ingredient these compounds or pharmaceutically acceptable salts thereof, wherein A represents a pyridine ring; formula (II) represents formula (III) or formula (IV); and R 1 , R 2 , R 3 , R 4 and R 5 are the same or different and each represents hydrogen, optionally substituted lower alkyl, cycloalkyl, alkenyl, aryl, carboxy or lower alkoxycarbonyl or does not exist, or R 2 and R 3 together form a nitrogenous heterocycle optionally having a nitrogen atom as another heteroatom, being fused with a benzene ring, or being substituted by lower alkyl.