To a solution containing the compound of Example 3 (0.08 g., 0.24 mmol) in N,N-dimethylformamide (5.00 mL) was added sodium hydride (0.011 g., 60% in oil, 0.29 mmol) at 0° C. The mixture was stirred at room temperature for 20 minutes, then cooled to 0° C. 4-Phenoxybutyl bromide (0.072 g., 0.32 mmol) was added to the mixture, the resulting mixture was stirred at room temperature for 16 hours. Water and ethyl acetate then were added to the mixture, and the organic and aqueous phases were separated. The aqueous layer then was extracted with ethyl acetate (2×). The combined ethyl acetate solution was dried (MgSO4) and filtered. The filtrate was concentrated in vacuo. The residue was subjected to preparative thin layer chromatography (silica gel, 50% EtOAc/hexane) to yield the alkylated compound (0.033 g, 29%) as a light yellow oil. 1H NMR (300 MHz, CDCl3) δ 7.42, 7.13, 7.03, 6.95, 6.87, 6.71, 5.81, 4.69-4.67, 4.09, 3.93, 3.75, 3.17-3.14, 2.97-2.94, 1.87-1.76; MS (ESI+) m/z 479 (M++1).
