An efficient synthesis of cyclic ADP-carbocyclic-ribose (2), as a stable mi
mic for cyclic ADP-ribose, was achieved. Treatment of N-1-carbocyclic-ribos
yladenosine bisphosphate derivative 10 with AgNO3 in the presence of molecu
lar sieves 3A in pyridine gave the desired cyclic product in 93% yield, whi
ch was deprotected to give the target cyclic ADP-carbocyclic-ribose (2).