反应详情

To a solution of 3-(methoxycarbonylmethyl-amino)-pyrrolidine-1-carboxylic acid tert-butyl ester (0.5 g, 2.03 mmol) in dichloroethane (5.0 mL) was added 4-chlorobenzaldehyde (0.34 g, 2.44 mmol), sodium triacetoxy borohydride (0.86 g, 4.06 mmol) and catalytic acetic acid and the resulting mixture was stirred at room temperature overnight. The reaction mixture was concentrated, dissolved in dichloromethane and washed with 10% aqueous sodium bicarbonate. The combined organics were washed with brine and dried over sodium sulfate. The crude product was purified on silica using ethyl acetate. 1H-NMR (CDCl3) δ: 1.40 (9H, s), 1.80 (1H, m), 2.10 (1H, m), 3.00-3.80 (7H, m), 4.70 (1H, br, s), 7.20 (4H, m). ESI-MS m/z: 383(M+1), UV retention time: 2.91 min.

1. concentrationThe reaction mixture was concentrated
2. dissolutiondissolved in dichloromethane
3. washwashed with 10% aqueous sodium bicarbonate
4. washThe combined organics were washed with brine
5. dry with materialdried over sodium sulfate
6. customThe crude product was purified on silica