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A Pd(II)-catalyzed regioselective C5 alkenylation of 2-acylpyrroles has been developed employing 3-nitrile benzoyl group (N-(3-NCC6H4CO-)) as an efficient N-protecting group. The protocol provided a simple and efficient method to synthesize C5-alkenylated 2-acylpyrrole derivatives. The employed N-protecting group was readily removable in the presence of HCl/EtOH under mild conditions.

Graphical abstract: Regioselective C5 alkenylation of 2-acylpyrroles via Pd(ii)-catalyzed C–H bond activation

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