Synthesis of Azole Nucleoside 5′‐Monophosphate Mimics (P1Ms) and Their Inhibitory Properties of IMP Dehydrogenases
摘要:
IMPDH inhibitors have potential antimicrobial, anticancer and immunomodulatory effects. Nucleoside inhibitors of IMPDH exert their inhibitory effects via nucleoside 5'-MPs. Conversion of nucleoside analogs to NMPs by cellular nucleoside kinases is not assured, and usually is inefficient. In order to bypass cellular phosphorylation, a series of azole nucleoside 5'-MP mimics (P1Ms) based on ribavirin, EICAR and bredinin were synthesized and screened against human and C. albicans IMP dehydrogenises. P1Ms 8, 16, 25, 28 and 29 demonstrated substantial IMPDH inhibition with K-i values in low micromolar range.
Nucleosides and Nucleotides. 140. Synthesis and Antileukemic Activity of 5-Carbon-Substituted 1-β-d-Ribofuflranosylimidazole-4-Carboxamides
摘要:
Synthesis of 5-carbon-substituted 1-beta-D-ribofuranosylimidazole-4-carboxamides are described. Treatment of 5-iodo derivative 8 with methyl acrylate in the presence of palladium catalyst gave (E)-5-(2-carbomethoxyvinyl)-1-(2,3,5-tri-O-acetyl- beta-D-ribofuranosyl)imidazole-4-carboxamide (9), followed by appropriate manipulations to afford various 5-carbon-substituted imidazole derivatives 1-7. The antileukemic activities of these imidazole nucleosides are also described.