Potassium Phosphate, Tribasic → 6-Bromoimidazo[1,2-a]pyridin-2-amine

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A stirred solution of N-(6-bromo-imidazo[1,2-a]pyridin-2-yl)-2,2,2-trifluoro-acetamide (9.0 g, 29.2 mmol) in DME (90 ml) and 1.27 M aqueous potassium phosphate (80.5 ml, 102.3 mmol) is heated at 90° C. overnight. After cooling to room temperature, the two layers are separate and the aqueous portion is extracted with EtOAc. The combined organic extracts are concentrated in vacuo to afford a brown oil. Iso-hexanes is added to the oil resulting in the formation of a solid. The excess iso-hexanes is decanted off and the remaining DME is azeotroped with THF (2×50 ml) to afford the title compound as a solid [MH+ 211.93].

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