A useful route is described for obtaining Z and E unsaturated alkylating agents 3 and 4. Coupling 6-azauracits 5 and 6 with unsaturated alkylating agent followed by the deprolection with H' resin gave acyclonucleosides 11-14 in good overall yields. Unsaturated acyclonucleosides phosphonates 19 and 20 were prepared using potassium carbonate as base and 4-bromobut-2-enyl diethyl phosphonate 16 as the alkylating agent. The introduction of a propargyl group at the N-3 position of acyclonucleasides 7, 8, 17, 18, 19, and 20 was achieved using potassium carbonate in DMF.
A useful route is described for obtaining Z and E unsaturated alkylating agents 3 and 4. Coupling 6-azauracits 5 and 6 with unsaturated alkylating agent followed by the deprolection with H' resin gave acyclonucleosides 11-14 in good overall yields. Unsaturated acyclonucleosides phosphonates 19 and 20 were prepared using potassium carbonate as base and 4-bromobut-2-enyl diethyl phosphonate 16 as the alkylating agent. The introduction of a propargyl group at the N-3 position of acyclonucleasides 7, 8, 17, 18, 19, and 20 was achieved using potassium carbonate in DMF.