Sodium Carbonate → (S)-methyl 2-(7-(4-(allyloxy)-4-methylpiperidin-1-yl)-2-(2'-(but-3-en-1-yl)-[1,1'-biphenyl]-3-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate

Participants

Reaction Conditions

Reaction Steps

To a solution of (S)-methyl 2-(7-(4-(allyloxy)-4-methylpiperidin-1-yl)-2-(3-bromophenyl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate (250 mg, 0.427 mmol) in DMF (5 mL) was added 2-(2-(but-3-en-1-yl)phenyl)-6-methyl-1,3,6,2-dioxazaborocane-4,8-dione (147 mg, 0.512 mmol), 2M sodium carbonate (0.427 mL, 0.854 mmol), and tetrakis(triphenylphosphine)palladium(0)(35 mg, 0.030 mmol). This reaction mixture was flushed with N2 and heated at 90° C. for 24 h. Upon completion of the reaction, the reaction mixture was partitioned between EtOAc and water. The organic phase was washed with water (3×), dried (MgSO4), filtered, and concentrated in vacuo to give the crude product as a brown oil. This was purified by Biotage chromatography (0-40% EtOAc/hexanes) to give 233 mg (86% yield) of (S)-methyl 2-(7-(4-(allyloxy)-4-methylpiperidin-1-yl)-2-(2′-(but-3-en-1-yl)-[1,1′-biphenyl]-3-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate as a colorless oil. LCMS (M+H).=637.

Provenance & Evidence