Abstract

An organocatalytic C(sp3)-H functionalization of 5-methyl-2,3-dihydrofuran derivatives with trifluoropyruvates was achieved via a sequential exo-tautomerization/carbonyl-ene process, providing the biologically important CF3-substituted 2,3-dihydrofurans in high yields. This method featured mild metal-free conditions, good chemoselectivity, and easy scalability.

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