Potassium Carbonate → 5-[7-(2-Chloro-pyridin-4-yl)-imidazo[1,2-c]pyrimidin-5-yl]-(1S,4S)-2,5-diaza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester

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Reaction Steps

To a 100 mL RBF was added 5-chloro-7-(2-chloro-pyridin-4-yl)-imidazo[1,2-c]pyrimidine (2.0 g, 7.6 mmol), 20 mL NMP, (S)—N-Boc-2,5-Diaza-bicyclo[2.2.1]heptane (1.6 g, 8.3 mmol), K2CO3 (1.05 g, 7.6 mmol) and DIEA (1.3 mL, 7.6 mmol). The mixture was stirred at rt under nitrogen for 15 h, and all starting material was converted. The reaction mixture was added to a 100 mL ice water slowly, and a white solid was precipitated out. The precipitate was filtrated and washed with 50 mL water, and further purified by flash chromatograph. The title compound was obtained. MS (ES+):427 (M+H)+.

Provenance & Evidence