Diisopropylethylamine → 1-(4-fluoro-phenyl)-1H-pyrazolo[3,4-c]pyridine-4-carboxylic acid [1-(5-methanesulfonyl-furan-2-yl)-cyclopropyl]-amide

Participants

Reaction Steps

To a stirred mixture of 1-(4-fluoro-phenyl)-1H-pyrazolo[3,4-c]pyridine-4-carboxylic acid (0.310 g, 1.21 mmol), N,N-diisopropylethylamine (0.630 mL, 3.62 mmol) and 1-(5-methanesulfonyl-furan-2-yl)-cyclopropylamine-hydrochloride salt (364 mg, 1.53 mmol) in DMF (30 mL) is added (benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate (PyBOP) (0.650 g, 1.25 mmol). After 18 hours, the mixture is diluted with saturated aqueous ammonium chloride (100 mL) and extracted with ethyl acetate (4×30 mL). The combined organic layers are washed with brine (50 mL), dried over sodium sulfate, filtered and concentrated. The residue is purified by silica gel chromatography eluting with a gradient of 0-100% ethyl acetate in hexanes to afford the title compound as a solid.

Provenance & Evidence