title: 3-(2-Carbamoylvinyl)-4,5-dimethylpyrrole-2-carboxylic acids as ligands at the NMDA glycine-binding site: a study on the 2-carbamoylvinyl chain modification.
abstract: Twenty 4,5-dimethylpyrrole-2-carboxylic acids (5a-t) with different 2-carbamoylvinyl chains in position 3 were prepared to further investigate the relationships between structure and in vitro affinity for the strychnine-insensitive glycine-binding site. None of these compounds was superior to (E)-3-(N-phenyl-2-carbamoylvinyl)-4,5-dimethylpyrrole-2-carb oxylic acid III (pKi = 6.70), which was taken as a reference standard, but overall the results obtained indicate that the N-phenyl-2-carbamoylvinyl substituent of III may be replaced with the N-(1-adamantyl)-2-carbamoylvinyl group as in 5h (pKi = 6.20) without considerable loss of affinity. This finding adds to previous knowledge.
mesh_terms: D000818:Animals; D002264:Carboxylic Acids / Q000138:chemical synthesis* / Q000737:chemistry / Q000378:metabolism; D002540:Cerebral Cortex / Q000187:drug effects / Q000378:metabolism / Q000648:ultrastructure; D018684:Glycine Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000378:metabolism; D066298:In Vitro Techniques; D008024:Ligands; D011758:Pyrroles / Q000138:chemical synthesis* / Q000737:chemistry / Q000378:metabolism; D051381:Rats; D016194:Receptors, N-Methyl-D-Aspartate / Q000187:drug effects* / Q000378:metabolism; D013329:Structure-Activity Relationship; D013331:Strychnine / Q000494:pharmacology; D013574:Synaptosomes / Q000187:drug effects / Q000378:metabolism