Regioisomeric 3-carboxyisoxazolinyl prolines (CIP-A and CIP-B) and 3-hydrox
yisoxazolinyl prolines [(+/-)-8 and(+/-)-9] were synthesized and assayed fo
r glutamate receptor activity. CIP-A [(+/-)-6] showed a convulsant activity
evaluated in vivo on DBA/2 mice, higher than AMPA and similar to kainic ac
id. The eutomer of CLP-A [CIP-AS, (-)-6], obtained from (S)-3,4-didehydropr
oline, evidenced common stereochemical requirements with AMPA and kainic ac
id. (C) 2000 Elsevier Science S.A. All rights reserved.