HCID 178435595, compound → HCID 178452388, compound

Participants

Reaction Steps

To a stirring solution of (S)-2-(5-ethynyl-1H-benzoimidazol-2-yl)-piperazine-1,4-dicarboxylic acid 1-benzyl ester 4-tert-butyl ester (77 mg, 0.16 mmol), (S)-2-(5-iodo-1H-benzoimidazol-2-yl)-piperidine-1-carboxylic acid benzyl ester (70 mg, 0.15 mmol), CuI (3 mg, 0.015 mmol) and bis(triphenylphosphine)palladium (II) dichloride (10.6 mg, 0.015 mmol) in DMF (2 mL) is added TEA (0.1 mL, 0.76 mmol). The reaction mixture is stirred at room temperature for 2 hours, diluted with EtOAc and water. The mixture is filtered to remove insoluble material and the layers of the filtrate are separated. The organic layer is dried over sodium sulfate and concentrated in vacuum to dryness. The residue is purified by flash column chromatography on silica gel (MeOH/DCM 0% to 20%) and repurified by reverse phase HPLC using a gradient of CH3CN/water to give the title compound (9.4 g, 7%).

Provenance & Evidence