Thionoesters (thiocarboxylic-O-esters), a class of sulfurcontaining compounds of general structure RC (S)-OR′, have been a focus of interest due to their altered reactivity relative to their oxygen analogues. 1, 2 For example, thionoesters can be readily desulfurized with Raney nickel to form the corresponding ethers. 3 This pathway to convert esters to ethers avoids many of the steric and functional limitations of other methods4 for ether formation ...