Two-step conversion of uridine and cytidine to variously C5-C functionalized analogs. 2023

Karolina Podskoczyj, and Anna Klos, and Szymon Drewniak, and Grazyna Leszczynska
Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, Lodz 90-924, Poland. grazyna.leszczynska@p.lodz.pl.

C5-substituted pyrimidine nucleosides are an important class of molecules that have practical use as biological probes and pharmaceuticals. Herein we report an operationally simple protocol for C5-functionalization of uridine and cytidine via transformation of underexploited 5-trifluoromethyluridine or 5-trifluoromethylcytidine, respectively. The unique reactivity of the CF3 group in the aromatic ring allowed the direct incorporation of several distinct C5-C "carbon substituents": carboxyl, nitrile, ester, amide, and amidine.

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