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.
Indeno\x9b1,2-E!pyrazine-4-ones, their preparation and the medicaments
申请人:Rhone-Poulenc Rorer S.A.
公开号:US05789406A1
公开(公告)日:1998-08-04
The compounds of formula (I) ##STR1## wherein R, R.sub.1 and R.sub.2 are defined in the disclosure, and salts thereof. The compounds of formula (I) are non-competitive N-methyl-D-asparate (NMDA) receptor antagonists, particularly NMDA receptor glycine modulation site ligands, and are alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor antagonists, this receptor is also known as the quisqualate receptor.