To a stirred suspension of NaH (56 mg, 2.33 mmol) in dry NMP (2 mL) was added 2,4,6-trimethyl phenol (317 mg, 2.33 mmol). The mixture was stirred at room temperature for 30 min under argon. The reaction mixture was added to a solution of 5-benzyl-4-chloro-5H-pyrrolo[3,2-d]pyrimidin-2-amine (200 mg, 0.78 mmol) in dry NMP (1.5 mL) and the resulting solution was heated at 90° C. for 16 h. After completion of the reaction, the reaction mixture was diluted with water and washed with EtOAc. The combined organic layers were washed with water, 2% NaOH, and brine and dried over Na2SO4, filtered, and concentrated in vacuo. The crude product was purified by column chromatography, eluting with hexanes/ethyl acetate (3:1) to give the product as a white solid (140 mg, 50%).
