A Novel One-Step Method for the Synthesis of C-5-Substituted O6,5‘-Cyclopyrimidine Nucleoside Analogues in Ammonia Water
摘要:
A novel one-step method for preparing C-5-substituted O-6,5'-cyclopyrimidine nucleoside analogues is reported. This method employs molecular iodine to mediate the cyclization from the 5'-O-hydroxyl group of the sugar ring and C-6 at the position of the nitrogen base in ammonia water under mild conditions without any other aprotic organic solvent.