To a solution of 2-(2-chloro-4-morpholinothieno[3,2-d]pyrimidin-6-yl)propan-2-amine (400 mg, 1.3 mmol) in CH2Cl2 (20 mL) was added Et3N (630 μL, 4.5 mmol) and methanesulfonyl chloride (200 μL, 2.6 mmol). The resulting mixture stirred at room temperature overnight. The reaction was quenched by the addition of saturated aqueous NaHCO3. The organic layer was separated and the aqueous layer was extracted with EtOAc. The combined organic layers were dried over Na2SO4, filtered, and concentrated in vacuo. The crude material was purified by silica gel chromatography (0-100% EtOAc in hexane). A portion (0.1 mmol) of the resulting pure product was utilized in a Suzuki coupling using General Procedure A with 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indazole 7 to provide 398 after reverse phase HPLC purification (8 mg). MS (Q1) 473 (M)+
