title: Synthesis of 4- and 5-amino-1-(2-deoxy-D-erythro-pentofuranosyl)imidazole nucleosides by chemical and biotransformation methods.
abstract: (2-Deoxy-D-erythro-pentofuranosyl)imidazole nucleosides have been synthesised by glycosylation of the sodium salt of ethyl 5-aminoimidazole-4-carboxylate with 2-deoxy-3,5-di-O-p-toluoyl-alpha-D-erythro-pentofuranosyl chloride. Glycosylation of ethyl 5-aminoimidazole-4-carboxylate with 2-deoxy-beta-D-erythro-pentofuranose was also achieved enzymically using E. coli, immobilised by ionotropic gelation in an alginate gel, with 2'-deoxyuridine as glycosyl donor. 5-Amino-1-(2-deoxy-beta-D-erythro-pentofuranosyl)imidazole-4-carboxylic acid 5'-phosphate and 4-amino-1-(2-deoxy-beta-D-erythro-pentofuranosyl)imidazole-5-carboxylic acid 5'-phosphate were synthesised by phosphorylation of the respective nucleosides and examined as inhibitors of phosphoribosylaminoimidazole carboxylase (EC 4.1.1.21) and phosphoribosylaminoimidazolesuccinocarboxamide synthetase (EC 6.3.2.6), which are involved in the de novo biosynthesis of purine nucleotides.
authors.affiliation: School of Chemistry, University of Hull, Great Britain.
authors.forename: D F
authors.initials: DF
authors.lastname: Ewing
authors.forename: A
authors.initials: A
authors.lastname: Holý
authors.forename: I
authors.initials: I
authors.lastname: Votruba
authors.forename: R W
authors.initials: RW
authors.lastname: Humble
authors.forename: G
authors.initials: G
authors.lastname: Mackenzie
authors.forename: F
authors.initials: F
authors.lastname: Hewedi
authors.forename: G
authors.initials: G
authors.lastname: Shaw
mesh_terms: D001711:Biotransformation; D002262:Carboxy-Lyases / Q000378:metabolism; D004926:Escherichia coli / Q000201:enzymology; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009705:Nucleosides / Q000096:biosynthesis / Q000138:chemical synthesis* / Q000737:chemistry; D010453:Peptide Synthases / Q000378:metabolism
chemical_list: D009705:Nucleosides; D002262:Carboxy-Lyases; C022378:phosphoribosylaminoimidazole carboxylase; D010453:Peptide Synthases; C022379:phosphoribosylaminoimidazole-succinocarboxamide synthetase