反应详情

A solution of diisopropylamine (1.55 mL, 11.9 mmole) in 20 mL of THF was cooled to −78° and treated with n-BuLi (6.5 mL 1.6N solution in hexane, 10.4 mmole). After 10 minutes, a solution of isobutyric acid (436 mg, 4.96 mmole) in 3 mL of THF was added, followed by HMPA (1.74 mL, 10 mmole). The reaction was allowed to warm to 23°, then heated at 55° for 30 minutes. The reaction was cooled to −78° and a solution of 3-benzyloxybenzyl chloride (1.15 g, 4.96 mmole) in 6 mL of THF was added. The reaction was warmed to 23° for 30 minutes, then heated at 55° for 30 minutes. The reaction was cooled, diluted with H2O, acidified with 3N HCl, and extracted with Et2O. The extracts were washed three times with H2O, dried and the solvent removed, and gave the titled compound as a white powder, 1.2 g (85% yield). MS (ESI) 285 (MH+).

1. temperatureto warm to 23°
2. temperatureheated at 55° for 30 minutes
3. temperatureThe reaction was cooled to −78°
4. temperatureThe reaction was warmed to 23° for 30 minutes
5. temperatureheated at 55° for 30 minutes
6. temperatureThe reaction was cooled
7. extractionextracted with Et2O
8. washThe extracts were washed three times with H2O
9. customdried
10. customthe solvent removed