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Abstract
A new method is introduced by thermolysis of 5′-O-trityl-2′,3′-O-triphenylphosphoranediyluridine Citation[4] with or without the presence of methanol to afford the 3-N-methyl-5′-O-trityluridine Citation[9] and 5′-O-trityl-2,2′-cyclouridine Citation[5], respectively. Mechanism for this thermolysis is also proposed.
ACKNOWLEDGMENTS
The authors would like to acknowledge the financial support from the National Natural Science Foundation of China (No. 39870415, No. 29632004), the Ministry of Science and Technology, Ministry of Education of China, and Tsinghua University.