Method A: In a 50 mL round bottom flask containing 25 mL of acetone was added compound 4 (0.50 g, 0.888 mmol), K2CO3 (0.16 g, 1.11 mmol) and 4-phenylphenol (0.15 g, 0.888 mmol). The reaction was heated (65 o C) to reflux with stirring for 72 h where a cloudy white solution was observed to form. Upon cooling, the acetone was removed in vacuo and redissolved with DCM (20 mL), filtered and washed with distilled H2O (3 × 20 mL). The organic phase was dried with MgSO4, filtered and brought to dryness on a rotovap. The crude product was washed with MeOH (3 × 20 mL) to afford a white coloured powder of 11. The NMR data was consistent with the previously reported literature. Yield: 0.40 g (40%).