Hydrogen Peroxide → (r)-5-Biphenyl-4-ylmethyl-3,3-dimethylpyrrolidin-2-one

Participants

Reaction Conditions

Reaction Steps

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 bisulfate 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).

Provenance & Evidence