Abstract
This communication describes the synthesis of 5′-deoxy-5′-chloro-3′-(2-thio-1,3,2-dioxaphosphorinanyl)thymidine, N4,2′,3′-triacetyl-5′-(2-thio-1,3,2-dioxaphosphorinanyl)-1-β-D-arabinosyl-cytosine and N4-acetyl-5′-(2-thio-1,3,2-dioxaphosphorinanyl)-1-β-D-arabinosylcytosine.