Water → methyl 3-(2,3-dichlorobenzyl)-2-methyl-5-morpholino-3H-imidazo[4,5-b]pyridine-7-carboxylate

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Reaction Steps

A mixture of methyl 2-methyl-5-morpholino-3H-imidazo[4,5-b]pyridine-7-carboxylate (200 mg, 0.72 mmol), 1-(bromomethyl)-2,3-dichlorobenzene), prepared as described in Example 3, step f, (259 mg, 1.08 mmol and Na2CO3 (229 mg, 2.16 mmol) in DMF (10 mL) was stirred at 80° C. for 16 h. The reaction mixture was cooled to room temperature and poured into water (100 mL). It was extracted with EtOAc (100 mL×2). The combined organic layers were washed with brine (100 mL×3), dried over anhydrous Na2SO4, filtered and concentrated in vacuo. The residue was purified by chromatography on silica gel eluted with MeOH/DCM=1/60 to afford the desired product as a black solid (243 mg, 78%); LC/MS: MS (ES+) m/e 435 (MH+); 1H NMR (300 MHz, DMSO-d6) δ ppm 2.46 (s, 3H), 3.40 (t, J=4.2 Hz, 4H), 3.67 (t, J=4.2 Hz, 4H), 3.92 (s, 3H), 5.50 (s, 2H), 6.60 (d, J=7.8 Hz, 1H), 7.06 (s, 1H), 7.27 (t, J=7.8 Hz, 1H), 7.60 (d, J=7.8 Hz, 1H).

Provenance & Evidence