Some carbocyclic uridines and cytidines have been prepared in a palladium-catalyzed reaction between 5-substituted uracils and cytosines and diacetoxymethylcyclopentene, prepared in a Prins reaction. The antiviral activity of the nucleoside analogues have been tested.
Ahmed, A. F. Sayed, Journal of Chemical Research, Miniprint, 1998, # 11, p. 2880 - 2894
Some Pd-catalyzed coupling reactions have been evaluated for the synthesis of 5-substituted cytosines. A large number of 5-arylcytosines were prepared in good yields by using 2,4-O,N-bis-trimethylsilyl-5-iodocytosine with various aryl tin compounds. The use of trimethylsilyl groups proved to be essential for the reaction, attempted coupling of 5-iodocytosine and 2-trimethylstannylthiazole was not successful