8-Methylureido-4,5-dihydro-4-oxo-10 H -imidazo[1,2- a ]indeno-[1,2- e ]pyrazines: highly potent in vivo AMPA antagonists
摘要:
A novel series of readily water soluble 8-methylureido-4,5-dihydro-4-oxo-10H-imidazo[1,2-a]indeno[1,2-e]pyrazines were synthesized. The -10-yl acetic acid ((+)-3) and -10-carboxylidene (4) derivatives exhibit potent affinities (IC50 = 4 and 19 nM, respectively) and antagonist properties (IC50 = 2 and 3 nM, respectively) at the ionotropic AMPA receptor. These compounds also display anticonvulsant properties against both electrically and sound-induced convulsions in mice after ip, sc and iv administration with ED50 values between 0.9 and 11 mg/kg, thus suggesting adequate brain penetration. (C) 2000 Elsevier Science Ltd. All rights reserved.
Imidazo (1,2-A)-Indeno (1,2-E) pyrazin-4-one derivatives and
申请人:Rhone-Poulenc Rorer S.A.
公开号:US05807859A1
公开(公告)日:1998-09-15
Pharmaceutical compositions containing, as the active principle, compounds of formula (I): ##STR1## wherein R, R.sub.1 and R.sub.2 are as defined in the description, or salts thereof, the novel compounds of formula (I), and the preparation thereof. The compounds of formula (I) have valuable pharmacological properties and are alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor antagonists, this receptor also being known as the quisqualate receptor. Furthermore, the compounds of formula (I) are non-competitive N-methyl-D-aspartate (NDMA) receptor antagonists, and particularly NMDA receptor glycine modulation site ligands.