反应详情

A solution of N1-(4-chloro-3-nitrophenyl)-N2,N2-dimethylglycinamide (1.0 g, 3.89 mmol), SnCL2×2 H2O (5.26 g, 23.3 mmol, Aldrich), and 1M HCl (2 mL, Aldrich) in absolute ethanol (100 mL) was allowed to stir at RT overnight. The reaction was diluted with methanol (100 mL) and quenched with saturated NaHCO3 (200 mL). After stirring 2 hrs at rt, the emulsion was filtered through a celite pad and filtrate evaporated. The residue was then resuspended in dichloromethane (200 mL), washed with water (200 mL), organic layer concentrated by rotary evaporation, and placed under high vacuum to provide N1-(3-amino-4-chlorophenyl)-N2,N2-dimethylglycinamide (0.9 g, 55%) as a brown solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 2.22 (s, 6 H) 2.99 (s, 2 H) 5.29 (s, 2 H) 6.68-6.74 (m, 1 H) 7.03 (d, J=8.61 Hz, 1 H) 7.22 (d, J=2.38 Hz, 1 H) 9.49 (s, 1 H). ESIMS (M+H)+=228.

1. customquenched with saturated NaHCO3 (200 mL)
2. stirringAfter stirring 2 hrs at rt
3. filtrationthe emulsion was filtered through a celite pad and filtrate
4. customevaporated
5. washwashed with water (200 mL), organic layer
6. concentrationconcentrated by rotary evaporation