7-Morpholin-4-yl-2-(3-morpholin-4-ylazetidin-1-ylmethyl)-5-(tributylstannanyl)thiazolo[5,4-d]pyrimidine → 4-(5-(1H-indazol-3-yl)-2-((3-morpholinoazetidin-1-yl)methyl)thiazolo[5,4-d]pyrimidin-7-yl)morpholine

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A mixture of 7-morpholin-4-yl-2-(3-morpholin-4-ylazetidin-1-ylmethyl)-5-(tributylstannanyl)thiazolo[5,4-d]pyrimidine (0.25 g, 0.37 mmol), 3-iodo-1H-indazole (0.2 g, 0.82 mmol), copper(I) 2-thiophene carboxylate (0.030 g, 0.150 mmol) and Pd(PPh3)4 (0.088 g, 0.075 mmol) in dioxane (3 mL) was subjected to microwave irradiation at 150° C. for 90 min. The reaction mixture was loaded onto an Isolute® SCX-2 cartridge. The cartridge was washed with MeOH and the desired product was eluted using 2 M NH3 in MeOH. The eluent was concentrated in vacuo and the residue was purified by flash chromatography (Si—PPC, MEOH:DCM, gradient 0:100 to 20:80) 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 182 as an off-white solid (0.036 g, 20%). LCMS (Method G): RT=7.40 min, [M+H]+ 493.3. 1H NMR (CDCl3, 400 MHz) δ 8.58 (d, J=8.2 Hz, 1 H); 7.55 (t, J=8.2 Hz, 1 H); 7.46-7.41 (m, 1 H); 7.34-7.29 (m, 1 H); 4.48-4.33 (m, 4 H); 4.02 (s, 2 H); 3.92 (t, J=4.6 Hz, 4 H); 3.73 (t, J=4.6 Hz, 4 H); 3.70-3.66 (m, 2 H); 3.18-3.09 (m, 3 H); 2.40-2.35 (m, 4H)

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