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The ortho‐substituent effect directed by the CF3CONH group exists in CuBr/N,N‐dimethylglycine‐catalyzed diaryl ether formation from o‐chlorotrifluoroacetanilides and phenols, leading to this coupling reaction proceeding at 80°C to afford a wide range of diaryl ethers. The halogen‐exchange also plays an important role in this transformation because adding potassium iodide is essential for complete...
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