Abstract: | "Full" acyclic analogues of ribonucleosides, 1-(1,2,6-trihydroxy-4-oxahex-3-yl)thymine and -cytosine, 3- and 9-(1,2,6-trihydroxy-4-oxahex-3-yl)adenine, and 9-(1,2,6-trihydroxy-4-oxahex-3-yl)guanine, have been prepared by condensation of silylated nucleo-bases with 1,4,5,6-tetraacetoxy-3-oxahexane in the presence of Lewis acids followed by deacetylation. |