5-Arylidene-pyrrolidine-2,3,4-trione 3-Oximes as NMDA Receptor Antagonists
摘要:
A series of oximes deriving from 5-arylidene-pyrrolidine-2,3,4-triones and pyridine-2,3,4-triones has been prepared. The presence of the tautomeric nitrosoenol was proven in solutions of alpha-ketooxime 7a. The binding affinity of the new oximes toward the N-methyl-D-aspartate (glycine site) receptor has been measured as a basis for more detailed structure-activity relationship studies. Oxime 13b showed the highest binding potency acting as glycine antagonist in nanomolar concentration.
3-hydroxypyridones 8/9 (azagrevellins) were prepared by reaction of the pyrrolidinetrione 4 and diazoalkanes. The ring enlargement proceeded by anionotropic [1,2]-rearrangement introducing carbon between C-3 and C-4 or, to a lesser extent, between C-2 and C-3 due to the different migration aptitudes of the two acyl groups involved. In a cognate manner ring expansion between C-2 and C-3 occured by the interaction of
A series of oximes deriving from 5-arylidene-pyrrolidine-2,3,4-triones and pyridine-2,3,4-triones has been prepared. The presence of the tautomeric nitrosoenol was proven in solutions of alpha-ketooxime 7a. The binding affinity of the new oximes toward the N-methyl-D-aspartate (glycine site) receptor has been measured as a basis for more detailed structure-activity relationship studies. Oxime 13b showed the highest binding potency acting as glycine antagonist in nanomolar concentration.