Table 4.
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Reaction conditions: 5 (0.1 mmol), 2 (0.15 mmol), Pd(OAc)2 (2.2 mg, 10 mol%), L28 (10 mol%), NBE-CO2Me (21.4 mg, 1.5 equiv.), AgOAc (33.4 mg, 2.0 equiv.), CH2Cl2 (1.0 mL), 100 °C, Air, 24 h.
Isolated yield.
The selectivity of mono- and di-products was determined by 1H NMR.