Nucleoside 3′,5′-Cyclic H-Phosphonates, New Useful Precursors for the Synthesis of Nucleoside 3′,5′-Cyclic Phosphates and Their Analogues

Nucleoside 3′,5′-Cyclic H-Phosphonates, New Useful Precursors for the Synthesis of Nucleoside 3′,5′-Cyclic Phosphates and Their Analogues