Ethyl Acetate → 4-(1-(5-Cyclopropylpyrimidin-2-yl)piperidin-4-yloxy)-1-(3,4-dichlorophenyl)-6-oxo-1,6-dihydropyridazine-3-carbonitrile

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a stirring solution of 1-(3,4-dichlorophenyl)-6-oxo-4-(piperidin-4-yloxy)-1,6-dihydropyridazine-3-carbonitrile HCl (50 mg, 0.137 mmol) in NMP (2 mL) at room temperature under argon was added DIPEA (53.1 mg, 0.411 mmol) and 2-chloro-5-cyclopropylpyrimidine (31.7 mg, 0.205 mmol). The resulting reaction mixture was heated at 100° C. under argon overnight. 15 mL of EtOAc was added to the reaction mixture. The reaction mixture was washed with water (15 mL), and brine (15 mL). Organic phase was dried (MgSO4), filtered and concentrated. The crude product was dissolved in a small amount of DCM (˜2 ml) and loaded onto a 40 g ISCO silica gel column which was eluted with a 20 min gradient from 20% to 100% EtOAc/Hexanes. 27 mg (38.8%) of 4-(1-(5-cyclopropylpyrimidin-2-yl)piperidin-4-yloxy)-1-(3,4-dichlorophenyl)-6-oxo-1,6-dihydropyridazine-3-carbonitrile was obtained as a white solid. 1H NMR (400 MHz, CDCl3) δ ppm 0.50-0.66 (m, 2H) 0.82-0.98 (m, 2H) 1.64-1.79 (m, 1H) 1.83-1.99 (m, 2H) 1.99-2.16 (m, 2H) 3.60-3.90 (m, 2H) 3.96-4.25 (m, 2H) 4.56-4.87 (m, 1H) 6.31 (s, 1H) 7.41-7.50 (m, 1H) 7.50-7.60 (m, 1H) 7.73 (d, J=2.20 Hz, 1H) 8.05-8.18 (m, 2H). MS (ESI) 483 (M+H).

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