Synthesis of novel N1-substituted bicyclic pyrazole amino acids and evaluation of their interaction with glutamate receptors |
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Authors: | Conti Paola Grazioso Giovanni di Ventimiglia Samuele Joppolo Pinto Andrea Roda Gabriella Madsen Ulf Bräuner-Osborne Hans Nielsen Birgitte Costagli Chiara Galli Alessandro |
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Institution: | Istituto di Chimica Farmaceutica e Tossicologica, Università degli Studi di Milano, Viale Abruzzi 42, I-20131 Milano. paola.conti@unimi.it |
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Abstract: | N1-substituted bicyclic pyrazole amino acids (S)-9a-9c and (R)-9a-9c, which are conformationally constrained analogues of glutamic acid, were prepared via a strategy based on a 1,3-dipolar cycloaddition. The new amino acids were tested for activity at ionotropic and metabotropic glutamate receptors. Some of them turned out to be selective for the NMDA receptors, where they behaved as weak antagonists. The biological activity is mainly due to the interaction with the glutamate binding site, and not with the glycine co-agonist site. |
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