Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Novel modified nucleosides 4, 11, ent-11, and 17, wherein the furanose ring oxygen is replaced by nitrogen, have been synthesized by reacting azasugars 3, 10, ent-10, and 15 with silylated uracil or thymine bases. ... A simple strategy for synthesis of azasugar-based ...