反应详情

温度

25 °C

To a solution of 4-(2,4-dioxo-3-tritylthiazolidin-5-ylmethyl)phenoxyacetic acid t-butyl ester (6.2 g) (obtained in Reference Example 5) in toluene (25 ml) was added p-toluenesulfonic acid monohydrate (204 mg). The resulting mixture was heated under reflux for 3 hours. Ethyl acetate (10 ml) was added while heating and then the mixture stirred at 25° C. for 1.5 hours. The resulting crystals were collected by filtration to afford the desired compound (2.5 g).

1. temperatureThe resulting mixture was heated
2. temperatureunder reflux for 3 hours
3. temperaturewhile heating
4. filtrationThe resulting crystals were collected by filtration