1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 68515662, compound

Participants

Reaction Steps

1-{4-[(Pentylamino)carbonyl]phenyl}-5-propyl-1H-1,2,3-triazole-4-carboxylic acid (487 mg, 1.41 mmol) obtained in Example 57b), HOBt (193 mg, 1.41 mmol, 1.0 eq.) and cyclopropylamine (0.131 ml, 1.84 mmol, 1.3 eq.) were dissolved in acetonitrile-DMF (1:1, 7.5 ml), WSC (332 mg, 1.70 mmol, 1.2 eq.) was added, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was concentrated, dissolved in ethyl acetate (40 ml), and washed with 5% aqueous sodium hydrogen carbonate solution, 10% aqueous ammonium chloride solution and saturated brine. The aqueous layers were each extracted with ethyl acetate-hexane (2:1, 30 ml). The organic layers were combined, dried over anhydrous sodium sulfate, and concentrated to give a white powder. This was crystallized from methanol-ethyl acetate to give the title compound as a white powder (298 mg, 0.777 mmol, 55.1%). The mother liquor was concentrated, and crystallized from diethyl ether to give the title compound as a white powder (225 mg, 0.587 mmol, 41.6%).

Provenance & Evidence