2-Butenoic acid, 3-(acetylamino)-, methyl ester, (2Z)- → 3-(3-fluoro-4-((3-morpholinopropyl)amino)phenyl)-2,6-dimethyl pyrimidin-4(3H)-one

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Reaction Steps

To a solution of 2-fluoro-N1-(3-morpholinopropyl)benzene-1,4-diamine (1.60 g, 6.23 mmol) in CH2Cl2 (30 mL) was added trimethylaluminum (22 mL, 44 mmol, 2 M in toluene) slowly at rt. The reaction mixture was stirred at rt for 0.5 h, followed by the addition of a solution of methyl 3-acetaminocrotonate (1.98 g, 12.59 mmol) in CH2Cl2 (10 mL). The reaction was stirred at rt overnight, then quenched with saturated NH4Cl aqueous solution and extracted with CH2Cl2 (50 mL×3). The combined organic phases were dried over anhydrous Na2SO4 and concentrated in vacuo. The residue was purified by a silica gel column chromatography (PE/EtOAc (V/V)=2:1) to give the title compound as a pale yellow solid (0.60 g, 27%). The compound was characterized by the following spectroscopic data:

Provenance & Evidence