Synthesis and Evaluation of Metabotropic Glutamate Receptor Subtype 5 Antagonists Based on Fenobam
作者:Moses G. Gichinga、Jeremy P. Olson、Elizabeth Butala、Hernán A. Navarro、Brian P. Gilmour、S. Wayne Mascarella、F. Ivy Carroll
DOI:10.1021/ml200162f
日期:2011.12.8
In an effort to discover potent and selective metabotropic glutamate receptor subtype 5 (mGluR5) antagonists, 15 tetrahydropyrimidinone analogues of 1-(3-chlorophenyl)-3-(1-methyl-4-oxo-4,5-dihydro-1H-imidazol-2-yl)-urea (fenobam) were synthesized. These compounds were evaluated for antagonism of glutamate-mediated mobilization of internal calcium in an mGluR5 in vitro efficacy assay. The IC50 value for 1-(3-chlorophenyl)-3-(1-methyl-4-oxo-1,4,5,6-tetrahydropyridine)urea (4g) was essentially identical to that of fenobam.
1-Methylisocytosine as a ligand for (dien)MII (M=Pt, Pd) and Pt-promoted deamination to 1-methyluracil
Abstract 1-Methylisocytosine (1-MeIC) can be protonated at the endocyclic N(3) position (pKa of 1-MeICH+, 4.02 ± 0.04) or complexed at this position with (dien)MII (M = Pt, Pd). X-ray crystal structures of the protonated species 1 as well as the Pd (2) and Pt (3) complexes are reported, and gas phase structures of the cation 2 and 3 have been calculated by ab initio methods. These results are compared