Redox-Neutral Annulation of Alkynylcyclopropanes with N-Aryloxyamides via Rhodium(III)-Catalyzed Sequential C-H/C-C Activation. 2019

Yang Li, and Dandan Shi, and Xin He, and Yongzhuang Wang, and Yuhai Tang, and Junjie Zhang, and Silong Xu
Department of Chemistry, School of Science, and Xi'an Key Laboratory of Sustainable Energy Materials Chemistry , Xi'an Jiaotong University , Xi'an 710049 , P. R. China.

Alkynylcyclopropanes have been used for the first time as coupling partners in transition-metal-catalyzed C-H functionalization. Specifically, a Cp*RhIII-catalyzed regioselective annulation of alkynylcyclopropanes with N-aryloxyamides via redox-neutral C-H/C-C activation has been developed, which affords highly functionalized 2,3-dihydrobenzofurans bearing an ( E)-exocyclic carbon-carbon double bond and a tetra-substituted carbon center in moderate to good yields with a broad substrate scope.

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