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Chelate to accelerate: A cascade reaction of ortho‐(alkynyl)phenyl furanyl ketones with Grignard reagents, involving an interesting intramolecular Diels–Alder reaction of furans with unactivated alkynes, is described (see scheme). DFT calculations and experimental results suggest that the formation of a chelated magnesium alkoxide plays an important role in accelerating the reaction rate and determining...
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