Diisopropylethylamine → N-(3-amino-5-isoquinolinyl)-N'-{1-[4-(trifluoromethyl)phenyl]ethyl}urea

Participants

Reaction Conditions

Reaction Steps

1-(1-Isocyanatoethyl)-4-(trifluoromethyl)benzene (1.64 mmol) in toluene (8 mL) was treated with N-(5-amino-3-isoquinolinyl)acetamide (220 mg, 1.09 mmol) and DIEA (1.4 mL). The mixture was heated at 80° C. for 6 hours, cooled to room temperature, and the precipitate was collected by filtration. The solid was triturated with 97:3 CH2Cl2:CH3OH and stirred as a suspension in 48% aqueous HBr (8 mL) at 60° C. for 4 hours. After cooling to room temperature, the mixture was poured into concentrated NH4OH (20 mL) and filtered. The solid was washed with water and air-dried to provide the title compound. The corresponding hydrochloride salt was prepared by treatment with methanolic HCl. 1H NMR (300 MHz, DMSO-d6) δ 9.05 (s, 1H), 8.64 (s, 1H), 7.91 (d, 1H), 7.58-7.74 (m, 4H), 7.22-7.36 (m, 3H), 7.14-7.18 (m, 2H), 6.97 (s, 1H), 4.94 (m, 1H), 1.44 (d, 3H, J=6.8 Hz); MS (ESI+) m/z 375 (M+H).

Provenance & Evidence