反应详情

To a stirring solution of 5-chloro-2-(quinolin-6-yl)benzoic acid (0.201 g, 0.708 mmol) and TEA (0.148 ml, 1.06 mmol) in 1,4-dioxane (10 ml) at RT, was added DPPA (0.191 ml, 0.244 mmol). After stirring for 30 min at RT, 2,2,2-trichloroethanol (0.680 ml, 7.08 mmol) was added and the reaction was stirred with heating at 100° C. for 2 h. The completed reaction was diluted with brine (10 ml) and extracted with EtOAc (3×25 ml). The combined organics were washed with 5% citric acid (10 ml), sat'd. NaHCO3 (10 ml) and brine (10 ml), dried (MgSO4), concentrated in vacuo and purified by chromatography to afford 2,2,2-trichloroethyl 5-chloro-2-(quinolin-6-yl)phenylcarbamate (0.25 g, 82% yield) as a white solid. MS (ESI) m/z: 431.0 (M+H+).

1. stirringthe reaction was stirred
2. temperaturewith heating at 100° C. for 2 h
3. customThe completed reaction
4. extractionextracted with EtOAc (3×25 ml)
5. washThe combined organics were washed with 5% citric acid (10 ml)
6. dry with materialNaHCO3 (10 ml) and brine (10 ml), dried (MgSO4)
7. concentrationconcentrated in vacuo
8. custompurified by chromatography