2-[4-(4-Morpholin-4-yl-2-(tributylstannanyl)-thieno[3,2-d]pyrimidin-6-ylmethyl)piperazin-1-yl]isobutyramide → 2-(4-((2-(6-Fluoroimidazo[1,2-a]pyridin-5-yl)-4-morpholinothieno[3,2-d]pyrimidin-6-yl)methyl)piperazin-1-yl)-2-methylpropanamide

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A mixture of 2-[4-(4-morpholin-4-yl-2-(tributylstannanyl)thieno[3,2-d]pyrimidin-6-ylmethyl)piperazin-1-yl]isobutyramide (69 mg, 0.10 mmol), 5-bromo-6-fluoro-imidazo[1,2-a]pyridine (25 mg, 0.12 mmol), Pd(PPh3)4 (12 mg, 0.01 mmol) and copper(I) thiophene-2-carboxylate (4 mg, 0.02 mmol) in dioxane (1 mL) was purged with argon gas then heated at 150° C., for 20 min, in a microwave reactor. The reaction mixture was loaded onto an Isolute® SCX-2 cartridge (10 g), washed with MeOH then eluted with 2 M NH3 in MeOH. The resulting residue was purified by flash chromatography (Si—PPC, MeOH:DCM, gradient 0:100 to 10:90) followed by reverse phase HPLC (Phenomenex Gemini 5u C18, 20 mM triethylamine in water on a gradient of acetonitrile 95:5 to 2:98) to give 214 as a white solid (20 mg, 37%). LCMS (Method G) RT 4.52 min; [M+H]+ 539. 1H NMR (400 MHz, CHCl3-d): 8.20 (s, 1 H); 7.71-7.62 (m, 2 H); 7.35 (s, 1 H); 7.25-7.16 (t, J=9.5 Hz, 1 H); 7.18-6.91 (m, 1 H); 5.22 (s, 1 H); 4.05 (t, J=4.7 Hz, 4 H); 3.87 (t+m, J=4.7 Hz, 6 H); 2.62 (s, 8 H); 1.25 (s, 6 H)

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