反应详情

温度

75 °C

2-Isopropyl-thiazole-4-carboxylic acid [6-acetyl-2-chloro-3-(2,2-dimethoxy-ethoxy)-phenyl]-amide (5.5 g, 12.91 mmol) and KOtBu (3.04 g, 27.11 mmol) were dissolved in tBuOH (100 mL) under an atmosphere of nitrogen. The reaction was heated to 75° C. for 4 hours. The reaction was cooled to rt and the pH was adjusted to 4 with 2N HCl(aq). The reaction mixture was concentrated and taken up in EtOAc (100 mL). The mixture was washed with ½ sat. brine. The organic layer was dried with Na2SO4, filtered and was concentrated. 8-Chloro-7-(2,2-dimethoxy-ethoxy)-2-(2-isopropyl-thiazol-4-yl)-quinolin-4-ol (4.49 g, 85%) was isolated by silica gel chromatography as a yellow solid.

1. temperatureThe reaction was cooled to rt
2. concentrationThe reaction mixture was concentrated
3. washThe mixture was washed with ½ sat. brine
4. dry with materialThe organic layer was dried with Na2SO4
5. filtrationfiltered
6. concentrationwas concentrated