反应详情

温度

0 °C

6 g (R)-5-Biphenyl-4-ylmethyl-1-(2,2-dimethylpropionyl)-3,3-dimethyl-pyrrolidin-2-one is added to THF (6 ml). Lithium hydroxide (15.6 ml, 3 mol L−1) is added followed by tetra-butylammonium bromide (0.15 g). This mixture is then added to a mixture of hydrogen peroxide (4.54 g) and THF (12 ml) at 0° C. After 2.5 h, sodium bisulfite solution (12 g, 38-40%) is added. THF is removed in vacuo. Toluene (70 ml) is added and the phases separated. The organic phase is washed with water (15 ml). The phases are separated. The organic phase is concentrated in vacuo and then heptane (60 ml) is added and the mixture cooled to 0° C.). The precipitate is collected by filtration and dried in vacuo to give (R)-5-Biphenyl-4-ylmethyl-3,3-dimethylpyrrolidin-2-one 1H NMR (DMSO): 0.96 (3H), 0.97 (3H), 1.52 (1H), 1.78 (1H), 2.61 (1H), 2.93 (1H), 3.75 (1H), 7.32 (3H), 7.45 (2H), 7.58 (2H), 7.63 (2H), 7.70 (1H).

1. customTHF is removed in vacuo
2. additionToluene (70 ml) is added
3. customthe phases separated
4. washThe organic phase is washed with water (15 ml)
5. customThe phases are separated
6. concentrationThe organic phase is concentrated in vacuo
7. additionheptane (60 ml) is added
8. filtrationThe precipitate is collected by filtration
9. customdried in vacuo