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Abstract | Cited by

We report a Rh(II)-catalyzed synthesis of aromatic furo[2,3-b]indoles via cyclopropenation of 3-diazooxindoles with arylacetylenes, followed by in situ rearrangement. A unique aspect of this transformation is the unprecedented activation of the otherwise inert C-2 oxygen atom of the diazooxindole moiety, providing a mild and efficient route to pharmaceutically relevant furoindole scaffolds.

Graphical abstract: Rh(ii)-catalyzed synthesis of furo[2,3-b]indoles from 3-diazooxindoles and electron-rich arylacetylenes

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