Sodium Carbonate → HCID 68807404, compound

Participants

Reaction Steps

2-(4-Bromo-2-fluoro-phenylcarbamoyl)-pyrrolidine-1-carboxylic acid tert-butyl ester (2 g, 4.8 mmol), 2-(methylthio)benzene boronic acid (0.98 g, 5.8 mmol), and tetrabutylammonium bromide (78 mg, 0.24 mmol) were combined in 30 mL toluene, added 5 mL of a 2M aqueous Na2CO3 solution followed by tetrakistriphenylphosphine palladium(0) (0.28 g, 0.24 mmol). The reaction was heated at reflux for 4 hours, cooled, concentrated, redissolved in EtOAc (250 mL), washed with water (3×200 mL), brine (200 mL), dried with MgSO4, filtered, and concentrated in the presence of 4 g coarse silica. The residue was purified by column chromatography on silica gel eluting with 20% EtOAc in hexanes to yield title compound as a yellow foam. (1.84 g, 88%) APCI (AP−): 429.2 (M−H)−.

Provenance & Evidence