反应详情

Pyridine (0.22 ml) was added to methyl-2-(4-(4-aminophenyl)thiazole-2-carboxamido)-3-methylbutanoate (Intermediate 3, 300 mg) in DCM (4 ml) and the reaction mixture was stirred for 5 minutes. 4-tert-butyl benzoyl chloride (230 mg) was added and reaction mixture was stirred for 16 hours at RT. Organic solvent was concentrated to obtain a sticky solid, which was purified by column chromatography (silica gel, EtOAc-petroleum ether) to obtain title compound as solid. Yield: 235 mg (53%). 1H NMR (DMSO-d6, 300 MHz): δ 10.31 (s, 1H), 8.83 (d, 1H), 8.36 (s, 1H), 8.10 (d, 2H), 7.91 (dd, 4H), 7.56 (d, 2H), 4.38 (t, 1H), 3.68 (s, 3H), 2.35 (m, 1H), 1.31 (s, 9H), 0.98 (t, 6H).

1. customreaction mixture
2. stirringwas stirred for 16 hours at RT
3. concentrationOrganic solvent was concentrated
4. customto obtain a sticky solid, which
5. customwas purified by column chromatography (silica gel, EtOAc-petroleum ether)