N-(3-(2-Chlorothieno[3,2-d]pyrimidin-7-yl)phenyl)methanesulfonamide (200 mg, 0.59 mmol) was dissolved in N,N-dimethylformamide (2.5 mL) and sodium hydride (36 mg, 0.89 mmol) was slowly added at 0° C. 10 minutes later, after adding iodomethane (100 mg, 0.71 mmol), the reaction mixture was stirred for an hour, diluted with ethyl acetate, and washed with brine. The organic layer was dried with magnesium sulfate, filtered, and then concentrated. The target compound (195 mg, 94% yield) was obtained without purification.
