Diisopropylethylamine → N-(4-Fluorophenyl)-N'-[4-({2-[(morpholin-4-ylcarbonyl)amino]pyridin-4-yl}oxy)phenyl]cyclopropane-1,1-dicarboxamide

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Reaction Steps

Morpholine-4-carboxylic acid [4-(4-aminophenoxy)pyridin-2-yl]amide (121 mg) and 1-(4-fluorophenylcarbamoyl)cyclopropanecarboxylic acid (92.0 mg) were dissolved in N,N-dimethylformamide (4 ml), and diisopropylethylamine (0.358 ml) and HBTU (O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate; 213 mg) were added under a nitrogen atmosphere at room temperature, followed by stirring for 4 hr. The reaction mixture was partitioned after addition of ethyl acetate (50 ml) and a saturated aqueous solution of sodium hydrogencarbonate (20 ml). The separated organic layer was washed with a saturated aqueous solution of sodium hydrogencarbonate (30 ml) and brine (30 ml), and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure, and the resultant residue was purified by silica gel column chromatography (eluent; heptane:ethyl acetate=1:7, then ethyl acetate). Fractions containing the target compound were concentrated under reduced pressure, and to the residue (131.9 mg) were added tert-butyl methyl ether (4 ml) and heptane (4 ml) to suspend a solid. The solid was collected by filtration, and dried under aeration to provide a titled compound as pale yellow powder (107.1 mg, 55.1%).

Provenance & Evidence