5-Chloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-[tri(propan-2-yl)silyl]-1H-pyrrolo[2,3-b]pyridine → 1-[3-(5-chloro-1H-pyrrolo[2,3-b]pyridin-4-yl)phenyl]-2-(1-hydroxyethyl)-5-[(4-methoxybenzyl)oxy]pyridin-4(1H)-one

Participants

Reaction Conditions

Reaction Steps

To a 250 mL round-bottom flask were added 2.25 g (5.23 mmol) of the first eluting enantiomer of 1-(3-bromophenyl)-2-(1-hydroxyethyl)-5-[(4-methoxybenzyl)oxy]pyridin-4(1H)-one, 4.55 g (10.46 mmol) 5-chloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-(triisopropylsilyl)-1H-pyrrolo[2,3-b]pyridine, and 0.427 g (0.523 mmol) 1,1′-bis(diphenylphosphino)ferrocene-palladium(II)dichloride dichloromethane complex. The flask was equipped with a condenser, evacuated, and purged with nitrogen. Evacuation was repeated three times and 50 mL THE and 25 mL 1 M aq cesium carbonate were added. The reaction mixture was heated at 85° C. for 15 h. Upon cooling, the organic layer was separated, washed with 10 mL water, dried over Na2SO4, filtered, and concentrated in vacuo. Purification by flash chromatography (silica gel, 0-100% hexane-ethyl acetate gradient, followed by 10% methanol wash) afforded 1-[3-(5-chloro-1H-pyrrolo[2,3-b]pyridin-4-yl)phenyl]-2-(1-hydroxyethyl)-5-[(4-methoxybenzyl)oxy]pyridin-4(1H)-one. LCMS (M+H)+ 502.4.

Provenance & Evidence