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Synthetic scheme for generating PFP sulfonate esters 61. Reagents and Conditions: (i) DCM, TEA, 0 °C, 59%; (ii) Method A: NaHCO3, anhydrous MgSO4, DCM, reflux, 24 h, 73%–90% [133]; Method B: NaOAc, EtOH, RT, 90% [134]; (iii) dry toluene, reflux, 1–24 h, 44%–75%. Reproduced in part from [130,131,132,133] with permission of the Royal Society of Chemistry and the American Chemical Society.
