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The use of enaminones as effective synthons for a directed C-H functionalization is reported. Proof-of-concept protocols have been developed for the Rh(III) -catalyzed synthesis of naphthalenes, based on the coupling of enaminones with either alkynes or α-diazo-β-ketoesters. Two inherently reactive functionalities (hydroxy and aldehyde groups) are integrated into the newly formed cyclic framework and a broad range of substituents are tolerated, rendering target products readily available for further elaboration.
Zhou et al. (Wed,) studied this question.