Scheme VI, Step A′: Into a 50 mL single neck flask [2-fluoro-2-(4-iodophenyl)propyl][(methylethyl)sulfonyl]amine (300 mg, 0.78 mmol, prepared in example 1), 4-carboxybenzene boronic acid (188 mg, 1.13 mmol), potassium carbonate (156 mg, 1.13 mmol) and tetrakis(triphenyl phosphine)palladium(0) (52 mg, 0.05 mmol) were combined in dioxane/water (30 mL, 3:1). The mixture was then heated at 100° C. with stirring for 18 hours. The reaction was cooled to room temperature and poured into H2O. The desired product was extracted with ethyl acetate and the organic layer was separated, washed twice with H2O, dried over K2CO3, and concentrated under reduced vacuum to yield the crude material (350 mg) as a tan solid. The crude material was purified via silica gel chromatography employing the Chromatotron using a 4000 micron rotor and eluting with a solvent of methylene chloride/methanol 9:1 to yield the title compound (91 mg, 31%) as a white solid.
