3,5′-Anhydrosynadenol: A Polycyclic Anhydronucleoside Analogue

Cyclization instead of O-phosphorylation is the result of the reaction of the antiviral nucleoside anologue 1 with highly reactive phosphorylating agents. The formation of the novel polycyclic compound 2 shows that 1 has the Z configuration, which is important for the antiviral activity of 1 and related compounds.