title: Synthetic strategies toward carbocyclic purine-pyrimidine hybrid nucleosides.
abstract: The blending of key structural features from the purine and pyrimidine nucleobase scaffolds gives rise to a new class of hybrid nucleosides. The purine-pyrimidine hybrid nucleosides can be viewed as either N-3 ribosylated purines or 5,6-disubstituted pyrimidines, thus recognition by both purine- and pyrimidine-metabolizing enzymes is possible. Given the increasing reports of the development of resistance in many enzymatic systems, a drug that could be recognized by more than one enzyme could prove highly advantageous in overcoming resistance mechanisms related to binding site mutations. In that regard, the design, synthesis and results of preliminary biological activity for a series of carbocyclic uracil derivatives with either a fused imidazole or thiazole ring are presented herein.
authors: Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA.
authors: Joshua M
authors: JM
authors: Sadler
authors: Sylvester L
authors: SL
authors: Mosley
authors: Kathleen M
authors: KM
authors: Dorgan
authors: Zhaohui Sunny
authors: ZS
authors: Zhou
authors: Katherine L
authors: KL
authors: Seley-Radtke
mesh_terms: D043383:Adenosylhomocysteinase / Q000037:antagonists & inhibitors / Q000378:metabolism; D004791:Enzyme Inhibitors / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D007093:Imidazoles / Q000737:chemistry; D015394:Molecular Structure; D011684:Purine Nucleosides / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D011741:Pyrimidine Nucleosides / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D013844:Thiazoles / Q000737:chemistry; D014498:Uracil / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology
chemical_list: D004791:Enzyme Inhibitors; D007093:Imidazoles; D011684:Purine Nucleosides; D011741:Pyrimidine Nucleosides; D013844:Thiazoles; D014498:Uracil; C029899:imidazole; D043383:Adenosylhomocysteinase