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Reaction conditions: N-tosylhydrazones (0.65 mmol, generated in situ from 4-bromobenzaldehyde 1a and TsNHNH2), alkenes 2 (0.50 mmol), CuCl2 (10 mol%), TMEDA (0.75 mmol), and TBN (2.0 mmol) in 4.0 mL THF at 65 °C for 24 h under air atmosphere.
