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A copper/Brønsted acid dual-catalyst promoted oxidative cross-dehydrogenative-coupling of alkylazaarenes and tertiary amines for C(sp3)–C(sp3) bond formation was developed. This method uses dioxygen as the terminal oxidant under mild reaction conditions and would provide a convenient benzylic C–H transformation of alkylazaarenes to biologically active pharmaceutics.
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Wang et al. (2014) studied this question.
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