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5′-O-Trityl -thymidine reacts with excess perfluorobutanesulfonyl fluoride/DBU in toluene to 5′-O-trityl-2,3′-anhydrothymidine in 75% yield. Free thymidine gives rise to 4′,5′-dehydro-2,3′-anhydrothymidine and to 5′-fluoro-2,3′-anhydrothymidine.
Dedicated to Professor Y. Mizuno on the occasion of his 7Sh birthday
Dedicated to Professor Y. Mizuno on the occasion of his 7Sh birthday
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