Dihydrofuran was an important structural skeleton of natural products and active molecules,and there was no report on the construction of such compounds through the cyclization reaction of inert alkanes and β-dicarbonyl compounds.In this study,we reported that dirhodium/NFSI can catalyze the reaction of inert cumene and β-dicarbonyl compounds in the presence of NaHCO3 by desaturation process and[3+2]cycloaddition to obtain twelve dihydrofuran compounds 3aa～3fb.The yield up to 50％.The structure of all products were confirmed by 1H NMR,13C NMR,HR-MS(ESI)spectro-scopic techniques.
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