Synthetic polyoxin type nucleosides

摘要: A novel class of intermediates from which a variety uronic acid nucleosides can be produced, said being represented by the following formula: ##SPC1## Where R 1 and 2 are lower alkyl radicals having one to six carbon atoms, or phenyl radicals; 3 is radical four atoms; wavy line at 5' position indicates both 5'-D-allo 5'-L-talo epimers. process for producing these described. converting ##SPC2## B pyrimidine purine base, also Novel nucleosides, structures falling within general formula given above, identified.