To a mixture of 4-chloro-6-(4-trifluoromethyl-phenyl)-pyrimidine, (Example 2(a), Method A), (0.20 g, 0.77 mmol) and 3-methyl-quinoxalin-5-ol (0.14 g, 0.85 mmol, prepared according to J. Med. Chem. 1988, 41, 4062–4079.) in DMF (3 mL) was added sodium hydride (0.040 g, 1.0 mmol, 60% dispersion in mineral oil, Aldrich). The reaction was heated at 60° C. for 24 h, allowed to cool to room temperature and partitioned between EtOAc and H2O. The aqueous layer was extracted with EtOAc (4×). The combined organic layers were dried over MgSO4, filtered and the solvent was removed in vacuum. The residue was purified by flash chromatography (0→75% EtOAc/hexanes) to give the title compound as an ivory powder. Mp: 139–141° C., MS (ESI, pos. ion) m/z: 383 (M+1).
