3′-deoxyparomamine (1), D-ribose and (S)-4-amino-2-hydroxybutyric acid (AHBA). The synthesis involves replacement of the 6′-hydroxyl group of 3′-deoxyparomamine with azidogroup, 1,6-carbamate ring formation, condensation with tri-O-(p-nitrobenzovl)-α,β-D-ribofuranosyl bromide, selective cleavage of the carbamate ring, and acylation of the free amino group at C-1 with AHBA.
Abstract Two types of mixed ester of β- d -ribofuranose were synthesized. The first had the same groups attached to O-1, 2, and 3, and the second had the same groups attached to O-2, 3, and 5. The three esters obtained in the highest yields, starting from d -ribose, were then converted into the halides and nitriles. Of the esters studied, the best suited for conversion into the nitrile was 1- O -acetyl-2