Fig. 4: Late-stage functionalization of M1G-dR and its analogues.

Reaction conditions: 9 (0.1 mmol, 1.0 equiv), 5c (20 mol%), selectfluor (2.0 equiv), TfOH (3.0 equiv), co-solvent DCM:MeOH (v/v 1:1, 4.4 mL) at 30 °C. Yield of isolated product. The ee values were determined by HPLC. The diastereomeric ratio (d.r.) was determined by 1H NMR spectroscopy of the crude reaction mixture. aKOH (3.0 equiv) was used as an additive. bThe ee values were determined by HPLC from the hydrolysed product. See Supplementary Information for details.