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Conditions: alkene (0.3 mmol), amine (7 equiv), and 4a (5 mol %) in 3 mL of 1,4-dioxane were irradiated for 6–72 h under an ambient atmosphere. Yields reported are isolated. a Diastereomeric ratio was determined by 1H NMR. b Reaction time, 18 h. c Reaction time, 72 h.
