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We report here a chromium-catalyzed intramolecular arylation of unactivated C–H bonds with C–halide bonds under mild conditions. This reaction was enabled by using a low-cost CrCl2 salt as the precatalyst in combination with allylmagnesium bromide and E/Z-mixed 1-halo-2-styrylarenes as substates, providing a strategy for the construction of functionalized phenanthrene compounds without using external ligands.
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Wang et al. (2024) studied this question.
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