Benzeneethanamine, alpha-methyl-, phosphate (1:1) → (S)-7-(2-fluoropyridin-3-yl)-3-(pyrimidin-2-yl)-5'H-spiro[chromeno[2,3-b]pyridine-5,4'-thiazol]-2'-amine

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A vial was charged with (S)-3-bromo-7-(2-fluoropyridin-3-yl)-5′H-spiro[chromeno[2,3-b]pyridine-5,4′-thiazol]-2′-amine (100 mg, 0.23 mmol), AmPhos (15.97 mg, 0.023 mmol), 2-(tributylstannyl)pyrimidine (333 mg, 0.90 mmol) and dioxane (1.50 mL). The vial was purged with Ar (g), sealed, and heated to 100° C. overnight. After cooling to rt, crude was diluted with MeOH (3 mL) and purified with reverse phase HPLC. Fractions containing product were washed with saturated aq. NaHCO3 (15 mL) and extracted with ethyl acetate (1×100 mL). The combined organic layers were dried over sodium sulfate, filtered, and concentrated in vacuo to provide a white solid, (S)-7-(2-fluoropyridin-3-yl)-3-(pyrimidin-2-yl)-5′H-spiro[chromeno[2,3-b]pyridine-5,4′-thiazol]-2′-amine (12 mg, 0.027 mmol, 12% yield). MS m/z=443.0 [M+H]+. Calc'd for C23H15FN6OS: 442.47.

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