1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → N-cyclopropyl-1-{4-[(ethylamino)carbonyl]phenyl}-5-(2-methylprop-1-en-1-yl)-1H-1,2,3-triazole-4-carboxamide

Participants

Reaction Steps

1-{4-[(Ethylamino)carbonyl]phenyl}-5-(2-methylprop-1-en-1-yl)-1H-1,2,3-triazole-4-carboxylic acid (490 mg, 1.56 mmol) obtained in Example 95b), HOBt (106 mg, 0.779 mmol, 0.5 eq.) and cyclopropylamine (0.145 ml, 2.03 mmol, 1.3 eq.) were dissolved in acetonitrile-DMF (2:1, 8.0 ml), WSC (366 mg, 1.87 mmol, 1.2 eq.) was added, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was concentrated, and the residue was diluted with ethyl acetate-hexane (5:1, 48 ml) and washed with 2% aqueous sodium carbonate solution, 10% aqueous ammonium chloride solution and saturated brine. The aqueous layers were each extracted with ethyl acetate-hexane-THF (4:1:1, 48 ml). The organic layers were combined, dried over anhydrous sodium sulfate and concentrated, and ethyl acetate was added to the residue. The precipitate was collected by filtration, washed with ethyl acetate and diethyl ether and dried to give the title compound as a white powder (526 mg, 1.49 mmol, 95.4%).

Provenance & Evidence