反应详情

To a solution of 3,3-diphenylpyrrolidine (Example 17A, 0.22 g, 1.00 mmol) in dichloromethane (20 mL) under nitrogen was added 2-(2-oxo-3,3-diphenylpyrrolidin-1-yl)acetic acid (Example 1C, 0.30 g, 1.00 mmol) followed by N1-((ethylimino)methylene)-N3,N3-dimethylpropane-1,3-diamine hydrochloride (0.38 g, 2.00 mmol) and N,N-dimethylpyridin-4-amine (0.61 mg, 0.005 mmol). The reaction mixture was stirred overnight at room temperature. The reaction was concentrated and the residue was partitioned in ethyl acetate/water (8:2, 400 mL). The organic layer was washed with water followed by brine, dried over magnesium sulfate, filtered, and concentrated. Silica gel chromatography eluting with ethyl acetate/hexane (1:1) gave the title compound. 1H NMR (300 MHz, CDCl3) δ ppm 7.16-7.40 (m, 20H), 4.14-4.25 (m, 2H), 4.09-4.12 (m, 2H), 3.38-3.61 (m, 4H), 2.75-2.87 (m, 2H), 2.49-2.63 (m, 2H); MS (DCI+) m/z 501 (M+H)+.

1. concentrationThe reaction was concentrated
2. customthe residue was partitioned in ethyl acetate/water (8:2, 400 mL)
3. washThe organic layer was washed with water
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. washSilica gel chromatography eluting with ethyl acetate/hexane (1:1)