Scheme 3. Scope of imidazole C–H alkenylation with Ni(OTf)₂/dcypt. ^a Unless otherwise noted, the reaction conditions were as follows: 1 (1.0 mmol), 2 (1.5 equiv.), Ni(OTf)₂ (10 mol%), dcypt (12 mol%), K₃PO₄ (3.0 equiv.), t-amylOH (4.0 mL), 120 °C, and 36 h.