Triethylamine → N-(4-Fluorophenyl)-N'-(4-{[2-({[4-(pyrrolidin-1-ylmethyl)piperidin-1-yl]carbonyl}amino)pyridin-4-yl]oxy}phenyl)cyclopropane-1,1-dicarboxamide

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Reaction Steps

4-(Pyrrolidin-1-ylmethyl)piperidine-1-carboxylic acid [4-(4-aminophenoxy)pyridin-2-yl]amide (125 mg) was dissolved in N,N-dimethylformamide (2 ml), and 1-(4-fluorophenylcarbamoyl)cyclopropanecarboxylic acid (176 mg), triethylamine (0.11 ml) and (1H-1,2,3-benzotriazol-1-yloxy)[tri(dimethylamino)]phosphonium hexafluorophosphate (349 mg) were added thereto in this order at room temperature, followed by stirring for 1 hr. Liquid-liquid separation was carried out after addition of ethyl acetate and a saturated aqueous solution of sodium hydrogencarbonate to the reaction mixture. The organic layer was washed with brine, and dried over anhydrous sodium sulfate. The solvent was concentrated under reduced pressure, and the resultant residue was purified by silica gel column chromatography (Fuji Silysia NH, eluent; heptane:ethyl acetate=1:5, then ethyl acetate). The solvent was concentrated under reduced pressure, and the resultant residue was suspended in diethyl ether (4 ml) and hexane (4 ml). The solid was collected by filtration and dried under aeration to provide the titled compound as white powder (121.2 mg, 63.8%).

Provenance & Evidence