Potassium Phosphate, Tribasic → tert-Butyl 2-((S)-2-(5-fluoro-2-(5-fluoro-1-tosyl-1H-pyrrolo[2,3-b]pyridin-3-yl)pyrimidin-4-ylamino)-3,3-dimethylbutylsulfinyl)ethanoate

Participants

Reaction Conditions

Reaction Steps

A solution of 5-fluoro-1-(p-tolylsulfonyl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrrolo[2,3-b]pyridine, 7a, (0.66 g, 1.58 mmol), tert-butyl((S)-2(2-chloro-5-fluoropyrimidin-4-ylamino)-3,3-dimethylbutylsulfinyl)ethanoate, 175a, (0.50 g, 1.27 mmol) and K3PO4 (0.65 g, 3.05 mmol) in 2-methyl THF (10 mL) and water (2 mL) was degassed under a stream of nitrogen for 30 minutes. X-Phos (0.04 g, 0.08 mmol) and Pd2(dba)3(0.02 g, 0.02 mmol) were added and the reaction mixture was heated at 115° C. in a pressure vial for 4 hours. The reaction mixture was cooled to room temperature, filtered and concentrated in vacuo. The residue was dissolved in EtOAc (50 mL) and washed with water. The organic layer was dried (MgSO4), filtered and concentrated in vacuo. The crude residue was purified by silica gel chromatography (0-60% EtOAc/Hexanes gradient) to afford 450 mg of the desired product as a white foamy solid: LCMS Gradient 10-90%, 0.1% formic acid, 5 minutes, C18/ACN, Retention Time=3.91 minutes (M+H) 648.40.

Provenance & Evidence