title: A rapid synthetic route to conformationally restricted [5,5]-bicyclic nucleoside-amino acid conjugates.
abstract: A concise synthetic route to a novel class of conformationally rigid 3',4'-cis-fused bicyclic nucleoside derivatives has been developed. The synthetic strategy and approach involves initial synthesis of a key [5,5]-bicyclic 6-aminofurofuran-2-one scaffold, employing an L-serine derived aminobutenolide as a strategically functionalized chiral template. Subsequent utilization of the carbonyl functionality of the above bicyclic lactone toward nucleobase incorporation, and linking of the resident amine functionality with appropriately protected amino acids completed the syntheses of the target bicyclic nucleoside-amino acid conjugates. Following the above route, and utilizing a combination of easily available nucleobases (4) and amino acids (4) as the two diversity elements, combinatorial synthesis of a 16-member demonstration library of the title amino acid-linked nucleosides has been accomplished.
authors.affiliation: Department of Medicinal Chemistry, The University of Kansas, Lawrence, Kansas 66045-7582, USA.
authors.forename: Kevin W C
authors.initials: KW
authors.lastname: Poon
authors.forename: Apurba
authors.initials: A
authors.lastname: Datta
mesh_terms: D000596:Amino Acids / Q000138:chemical synthesis* / Q000737:chemistry; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000138:chemical synthesis* / Q000737:chemistry; D020650:Combinatorial Chemistry Techniques; D009690:Nucleic Acid Conformation; D009705:Nucleosides / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D000596:Amino Acids; D019086:Bridged Bicyclo Compounds, Heterocyclic; D009705:Nucleosides