To a solution of the product of Example 149D (1.09 g, 2.97 mmol) and N-(4-nitrobenzyl)aniline (0.677 g, 2.97 mmol) dissolved in DMF (10 mL) was added potassium carbonate (1.23 g, 8.9 mmol) and the mixture heated at 50° C. for 1 hour. After cooling, the solution had dichloromethane added to it and the mixture extracted with water. The organic extract was then dried, filtered, concentrated and purified by chromatography (silica gel, 0-2% methanol in dichloromethane) to afford 0.85 g (56%) of the title compound. MS (ESI) m/z 514 (M+H)+.
