Hydrochloric Acid → HCID 178436722, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 4-chloro-6-[(1E)-3,3-diethyltriaz-1-en-1-yl]-5-ethynyl-3′-fluorobiphenyl-2-carboxylic acid (2.7 g, 7.1 mmol) in N,N-dimethylformamide (14 mL) was treated with N,N-diisopropylethylamine (4.3 mL, 25 mmol) followed by O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (3.5 g, 9.3 mmol) and stirred at 20° C. for 5 minutes. The reaction mixture was treated with N,O-dimethylhydroxylamine hydrochloride (0.9 g, 9.3 mmol) and stirred at 20° C. for 1 hour. The reaction mixture was poured into 0.5 M hydrogen chloride in water (100 mL) and extracted with ethyl acetate (150 mL). The organic layer was washed with saturated sodium bicarbonate (50 mL), brine (25 mL), dried with sodium sulfate, filtered, and concentrated to a crude residue. Purification by flash column chromatography using ethyl acetate in hexanes (0% - 40%) gave the desired product (2.7 g, 92% for 2 steps). LCMS for C21H23ClFN4O2 (M+H)+: m/z=417.1; Found: 417.0.

Provenance & Evidence