反应详情

温度

95 °C

Dissolve 3-(4-{[2-(4-chloro-phenyl)-4-(2,2-dimethoxy-ethyl)-thiazole-5-carbonyl]-amino}-2-methoxy-phenoxy)-azetidine-1-carboxylic acid tert-butyl ester (18.9 g, 31.28 mmol) and p-toluenesulfonic acid monohydrate (19.7 g, 103.56 mmol) in dry toluene (460 mL) and stir mechanically at 95° C. overnight. Cool the reaction mixture and add 1 N NaOH. Stir the mixture vigorously at room temperature for one hour. Extract the aqueous layer with CH2Cl2 (2×700 mL). Combine the organic portions, wash with brine (700 mL), dry over MgSO4, and filter. Concentrate the filtrate in vacuo to give 13.0 g (85%) of the title compound. ES/MS m/z (35Cl) 440.0 [M+1]+.

1. temperatureCool the reaction mixture
2. stirringStir the mixture vigorously at room temperature for one hour
3. extractionExtract the aqueous layer with CH2Cl2 (2×700 mL)
4. washCombine the organic portions, wash with brine (700 mL)
5. dry with materialdry over MgSO4
6. filtrationfilter
7. concentrationConcentrate the filtrate in vacuo