Condensation of muscimol or thiomuscimol with aminopyridazines yields GABA-A antagonists
作者:Anita Melikian、Gilbert Schlewer、Jean Pierre Chambon、Camille Georges Wermuth
DOI:10.1021/jm00100a015
日期:1992.10
Ten analogs of muscimol and thiomuscimol in which the amino function was delocalized in an amidinic system were prepared by N2 alkylation of 6-aryl-3-aminopyridazines with (chloromethyl)isoxazole or (chloromethyl)isothiazole derivatives. These muscimol and thiomuscimol derivatives show potent binding properties for GABA-A receptors (they displace [3H]GABA and [3H]gabazine) and provoke convulsions after
AMPA Receptor Agonists: Synthesis, Protolytic Properties, and Pharmacology of 3-Isothiazolol Bioisosteres of Glutamic Acid
作者:Lisa Matzen、Anne Engesgaard、Bjarke Ebert、Michael Didriksen、Bente Frølund、Povl Krogsgaard-Larsen、Jerzy W. Jaroszewski
DOI:10.1021/jm9607212
日期:1997.2.1
mumol/kg) was more potent than 2a (220 mumol/kg) as a convulsant after subcutaneous administration in mice. The protolytic properties of 2a,b-4a,b were determined using 13C NMR spectroscopy. For each pair of compounds, the alpha-amino acid groups showed similar protolytic properties, whereas the 3-isoxazolol moieties typically showed pKa values 2 units lower than those of the 3-isothiazolols. Accordingly