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Mildly basic aqueous conditions facilitated the tert-butyl peroxybenzoate (TBPB) mediated dehydrogenative addition of a range of ethers, including acetals, to diverse substituted 2-isocyanobiaryls. Mechanistic studies suggest that this radical cascade is an example of base promoted homolytic aromatic substitution (BHAS).

Graphical abstract: A radical addition/cyclization of diverse ethers to 2-isocyanobiaryls under mildly basic aqueous conditions

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