The protecting-group free selective 3′-functionalization of nucleosides† †Electronic supplementary information (ESI) available. CCDC 1525736–1525737. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c6sc05081f Click here for additional data file. Click here for additional data file.

General ............................................................................................................................................S1 General Procedure A: Preparation of 3’-Phosphorylated Nucleosides .................................S1 Preparation of 3’-acetylated Nucleosides...................................................................................S8 NMR Studies ...................................................................................................................................S9 NMR Sprectra for new compounds..............................................................................................S12