3-(Trifluoromethyl)phenyl isocyanate → Methyl 3-methyl-2-(5-(4-(3-(3-(trifluoromethyl)phenyl)ureido)phenyl)thiazole-2-carboxamido)butanoate

関与物質

反応手順

To a solution of methyl 2-(5-(4-aminophenyl)thiazole-2-carboxamido)-3-methylbutanoate (Intermediate 2, 120 mg) in THF (2.4 ml) was added 1-isocyanato-3-(trifluoromethyl)benzene (101 mg) and the mixture was stirred overnight at RT. The mixture was concentrated, purified by column chromatography (EtOAc:Pet ether, 2:8) and crystallized in CHCl3/pet ether to give the title compound. Yield: 156 mg (83%); 1HNMR (DMSO-d6, 300 MHz): δ 9.12 (s, 1H), 9.08 (s, 1H), 8.36 (s, 1H), 8.03 (d, 1H), 7.74 (d, 2H), 7.61 (d, 2H), 7.55 (dd, 1H), 7.5 (m, 1H), 7.32 (dd, 1H), 4.33 (m, 1H), 3.68 (s, 3H), 2.26 (m, 1H), 0.92 (d, 6H); MS (ES+): m/z 521 (M+1).

情報源と証拠