反应详情

温度

-78 °C

To a solution of trans-(3-benzyloxy-cyclobutyl)-acetic acid methyl ester (110 mg, 0.47 mmol) in THF (1 mL) is added 1.09M LDA in THF and hexane (1.51 mL, 1.65 mmol) at −78° C. under nitrogen, and stirred at −78° C. for 30 min. To the mixture, iodomethane (232 ul, 3.76 mmol) is added, and the mixture is stirred at −78° C. for 30 min. The temperature is slowly warmed to room temperature for 3 hours. To the mixture, H2O is added and extracted with AcOEt. The organic layer is dried over MgSO4 and concentrated under reduced pressure to give trans-2-(3-benzyloxy-cyclobutyl)-propionic acid methyl ester (94 mg, 80%); ESI-MS m/z 249 [M+1]+, retention time 2.07 min (condition A).

1. stirringthe mixture is stirred at −78° C. for 30 min
2. temperatureThe temperature is slowly warmed to room temperature for 3 hours
3. extractionextracted with AcOEt
4. dry with materialThe organic layer is dried over MgSO4
5. concentrationconcentrated under reduced pressure