反应详情

To a solution of 4-methoxybenzyl 2-hydroxypropionate (4.2 g, 20 mmole), N-CBZ-L-valine (5.02 g, 20 mmole) and DMAP (0.24 g, 2 mmole) in 100 ml dichloromethane was added a solution of DCC (4.54 g, 22 mmole) and the mixture was stirred overnight at room temperature. The mixture was cooled to 5° C. and the urethane was filtered. The filtrate was evoporated and the product was isolated by silica gel column chromatography. Yield: 7.9 g

1. temperatureThe mixture was cooled to 5° C.
2. filtrationthe urethane was filtered
3. customthe product was isolated by silica gel column chromatography