Table 1.
Conditions: 1 (0.1 mmol), Pd(OAc)2 (10 mol%), Ligand (10 mol%), N-(4-nitrophenyl)maleimide (0.15 mmol), AgOAc (0.2 mmol), HFIP (0.5 mL), 100 °C, 24 h.
The yield and diastereomeric ratio were determined by 1H NMR analysis of the crude product using CH2Br2 as the internal standard.