反应详情

温度

22 °C

5.6 ml of triethylamine are added at 22° C. to a stirred suspension of 5.55 g of the alcohol from Example 8 in 27 ml of acetone and 6.64 g of p-toluenesulphonyl chloride and stirred at 22° C. for 6.5 hours. The suspension is treated with water, stirred at 10° C., filtered, the residue is washed with a water/acetone solution (3:2) and dried to give 9.09 g (94%) of 99% p-toluenesulphonic acid (4S,5S)-4-benzyl-2-oxo-oxazolidin-5-ylmethyl ester, m.p. 148.7°-150.3° C., [α]D20 : +3.0° (1% acetone).

1. stirringstirred at 10° C.
2. filtrationfiltered
3. washthe residue is washed with a water/acetone solution (3:2)
4. customdried