Progress and prospects in copper-catalyzed C-H functionalization.

successfully performed the synthesis of diverse phenols derivatives 111 via copper-catalyzed highly significant ortho -selective C–H functionalization of unprotected phenols and naphthols 109 with α-aryl-α-diazoesters 110. 64 The reaction works well in 1,2-dichloroethane at rt in the presence of 5 mol% of CuCl 2 as the catalyst ( Scheme 40 ).

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