An efficient methodology to substituted furans via oxidation of functionalized α-diazo-β-ketoacetates.


DMDO oxidation of functionalized α-diazo-β-ketoacetates, formed by zinc triflate catalyzed Mukaiyama-aldol condensation of methyl diazoacetoacetate with aldehydes, occurred in quantitative yield to form dihydrofuranols that undergo acid catalyzed dehydration under mild conditions to generate 3-methoxyfuran-2-carboxylates in good yield. 


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