3-Fluorophenol → Methyl 4-[(1S)-1-({[5-chloro-2-(3-fluorophenoxy)pyridin-3-yl]carbonyl}amino)ethyl]benzoate

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl 4-((1S)-1-{[(2,5-dichloropyridin-3-yl)carbonyl]amino}ethyl)benzoate (step 1, 177 mg, 0.50 mmol), 3-fluorophenol (224 mg, 2.0 mmol) and sodium bicarbonate (105 mg, 1.25 mmol) in 1-methylpyrrolidin-2-one (2 mL) was stirred at 100° C. for 24 h. After cooling, the reaction mixture was partitioned between water (50 mL) and dichloromethane (50 mL) and the organic phase was separated. The aqueous phase was extracted with dichloromethane (50 mL). The combined organic layer was washed with brine (100 mL), dried (sodium sulfate), and concentrated. The residue was purified by flash column chromatography on silica gel (10 g) eluting with hexane/ethyl acetate (4/1) to afford 180 mg (84%) of the title compound as white solids: 1H-NMR (CDCl3) δ 8.55 (1H, d, J=2.7 Hz), 8.15 (1H, d, J=2.7 Hz), 8.07–7.98 (3H, m), 7.47–7.37 (3H, m), 7.07–6.99 (1H, m), 6.98–6.88 (2H, m), 5.42–5.31 (1H, m), 3.90 (3H, s), 1.60 (3H, d, J=7.0 Hz); MS (ESI) m/z 429 (M+H)+, 427 (M−H)−.

Provenance & Evidence