A variety of terminal alkynes were converted into the corresponding 4-(2-oxoalkoxy)butyl methanesulfonates via a gold-catalyzed intermolecular oxidation reaction using 8-ethylquinoline N-oxide as the oxidant and THF as the solvent. This reaction is proposed to proceed through the ring-opening of THF via an α-oxo gold carbene intermediate.
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Huang et al. (2014) studied this question.
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