Table 2. Scope of the allylic substrates.

^aUnless otherwise noted, the reaction conditions were as follows: 1a (0.5 mmol), 2 (3 mL), [Cu(OTf)₂] (0.01 mmol), DTBP (1.25 mmol), EtOAc (0.5 mL), 120 °C, 9 h. ^bYields of isolated products. ^cDTBP (2.0 mmol). DTBP = Di-tert-butyl peroxide. ^d(Z)-cyclododecene (2 ml).