Design and Racemic Synthesis of Conformationally Restricted Carbocyclic Pyrimidine Nucleoside Analogs Based on the Structure of the L-Nucleoside Residue in Heterochiral DNA.
Carbocyclicpyrimidinenucleoside analogs which have restricted glycosidic conformation at chi approximately 180 degrees were designed, based on the conformational features of the L-nucleotide residue in heterochiral DNA, and synthesized. The synthesis of (+/-)-carbocyclic 6,6'-O-cyclo-2'-deoxyuridine was achieved via bromination and subsequent intramolecular cyclization of carbocyclic 6'beta-hydroxy-2'-deoxyuridine