Cesium carbonate → HCID 68945358, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 5-(4-chloro-phenyl)-1-[3-(2,5-dimethyl-pyrrole-1-sulfonyl)-phenyl]-6-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-1,5-dihydro-pyrazolo[3,4-d]pyrimidin-4-one (0.950 g, 1.393 mmol) in N,N-dimethylformamide (40 mL) is degassed with argon for 0.5 h. Then 5-amino-2-bromopyridine (0.43 g, 2.507 mmol), cesium carbonate (0.907 g, 2.78 mmol), Pd(dppf)2Cl2 (0.122 g, 0.167 mmol) is added and the resultant mixture is degassed with argon for 0.5 h. The reaction mixture is then heated at 100° C. for 6 h. The reaction mixture is cooled to rt and diluted with water and extracted with ethyl acetate (3×). The combined organic layer is washed with brine, dried over Na2SO4, concentrated, and purified by column chromatography (silica gel 60-120 mesh) to afford 6-[4-(5-amino-pyridin-2-yl)-phenyl]-5-(4-chloro-phenyl)-1-[3-(2,5-dimethyl-pyrrole-1-sulfonyl)-phenyl]-1,5-dihydro-pyrazolo[3,4-d]pyrimidin-4-one.

Provenance & Evidence