Sodium Carbonate → tert-butyl 4-(6-(6-(1H-pyrazol-4-yl)-1H-pyrazolo[4,3-c]pyridin-1-yl)pyridin-2-yl)-1,4-diazepane-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A suspension of tert-butyl 4-(6-(6-chloro-1H-pyrazolo[4,3-c]pyridin-1-yl)pyridin-2-yl)-1,4-diazepane-1-carboxylate (500 mg, 1.16 mmol), 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (679 mg, 3.5 mmol), Pd(dppf)Cl2 (47.5 mg, 0.058 mmol), and aqueous solution of Na2CO3 (saturated, 3 mL) in 1,4-dioxane (10 mL) under nitrogen was heated at 100° C. for 16 hours. The reaction mixture was filtered and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel chromatography using petroleum ether/EtOAc (1/1) as eluting solvents to afford tert-butyl 4-(6-(6-(1H-pyrazol-4-yl)-1H-pyrazolo[4,3-c]pyridin-1-yl)pyridin-2-yl)-1,4-diazepane-1-carboxylate as a yellow solid (360 mg, 67%). MS (ESI) m/z: 461 [M+H]+.

Provenance & Evidence