2,6-Difluorophenyl isocyanate → Ethyl 3-(4-(3-(2,6-difluorophenyl)ureido)-3-methylphenyl)isoxazole-5-carboxylate

Beteiligte Stoffe

Reaktionsschritte

Ethyl 3-(4-amino-3-methylphenyl)isoxazole-5-carboxylate (1.0 equiv.), 2,6-difluoro phenyl isocyanate (1.2 equiv.) and tetrahydrofuran was taken in a round bottom flask and was stirred at room temperature for 48 hours. The solid precipitate was filtered and washed with minimum quantity of THF and dried in vacuo to afford the title compound as a white solid (91%); 1H NMR (300 MHz, DMSO-d6) δ: 1.29-1.34 (t, J=7.0 Hz, 3H), 2.31 (s, 3H), 4.33-4.40 (q, 2H), 7.11-7.17 (m, 2H), 7.24-7.31 (m, 1H), 7.71-7.74 (dd, J=8.7 Hz, 1.8 Hz, 1H), 7.81 (s, 2H), 8.04-8.07 (d, J=8.7 Hz, 1H), 8.31 (s, 1H), 8.65 (s, 1H); IR (KBr) 3292, 3132, 2984, 1723, 1644, 1621, 1588, 1560 1471, 1449, 1288, 1235, 1125, 1006, 849, 768 cm−1.

Herkunft & Nachweise