Dicyclohexylcarbodiimide → 3-{6-[2-(2,4-Dichloro-phenyl)-ethylamino]-2-methoxy-pyrimidin-4-yl}-benzoic acid 2-morpholin-4-yl-ethyl ester

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Reaction Steps

4-Dimethylaminopyridine (4.4 mg, 0.036 mmol) is added to a stirred solution of 3-{6-[2-(2,4-dichloro-phenyl)-ethylamino]-2-methoxy-pyrimidin-4-yl}-benzoic acid (100 mg, 0.24 mmol), N-(2-hydroxyethyl) morpholine (29.07 μL, 0.24 mmol) and 1,3-dicyclohexylcarbodiimide (0.31 mL, 1 M solution in DCM) in dry THF/DCM (6 mL, 1:1) and the reaction mixture is stirred for 5.5 hours at room temperature under nitrogen atmosphere. The mixture is filtered over a pad of Celite and the filtrate concentrated under reduced pressure. The residue is dissolved EtOAc (30 mL), washed with saturated aqueous sodium bicarbonate and brine, dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude residue is purified by chromatography (SiO2 packed column) eluting with ethyl acetate/heptane to afford 3-{6-[2-(2,4-dichloro-phenyl)-ethylamino]-2-methoxy-pyrimidin-4-yl}-benzoic acid 2-morpholin-4-yl-ethyl ester (56 mg, Example 75). LCMS: RT=2.07 minutes, MS: 534 (M+H); 1H NMR, (300 MHz, CDCl3): □8.62 (1H, s), 8.3 (1H, d, J=3.5 Hz), 8.1 (1H, d, J=3.5 Hz), 7.55 (1H, t, J=3.5 Hz), 7.42 (1H, s), 7.2 (2H, s), 6.48 (1H, s), 5.04 (1H, b), 4.5 (2H, t, J=2 Hz), 4.05 (3H, s), 3.72 (6H, t, J=2 Hz), 3.1 (2H, t, J=2 Hz), 2.8 (2H, t, 2 Hz), 2.6 (4H, t, 2 Hz).

Provenance & Evidence