The fluorination procedure was performed as described in Lal, G S, et al. J. Org Chem., 60:7340-7342 (1995). The product from Example 13A, Part B (0.42 g, 1.26 mmol) and Selectfluor™ (0.672 g, 1.9 mmol) were combined in a mixture of acetonitrile (8 mL) and methanol (1 mL) and heated at 90° C. under N2 for 5 h. The solution was diluted with water, extracted into ethyl acetate, washed with sodium bicarbonate solution, concentrated and purified by column chromatography on silica gel to give the title compound (0.138 g, 29%).
