反应详情

9.2 Grams (0.4 moles) of metallic sodium was dissolved in 300 ml of absolute ethanol. To the resulting solution, a solution of 27 g (0.2 moles) of benzhydroxamic acid in 600 ml of absolute ethanol was added dropwise 20°-25° C. with stirring for 3 hours. Subsequently, a solution of 9.5 g (0.1 mole) of chloroacetic acid in 100 ml of absolute ethanol was added dropwise and the resulting mixture wa stirred at 50° C. for 8 hours. After cooling the mixture, water was added and the mixture was neutralized with concentrated HCl. Ethanol was distilled off under vacuum and the pH of the residue was adjusted to 1 by addition of concentrated HCl. The precipitating crystal was recovered by filtration and dried to obtain benzamidooxyacetic acid in an amount of 8.2 g (yield, 42 mol %).

1. stirringthe resulting mixture wa stirred at 50° C. for 8 hours
2. additionwas added
3. distillationEthanol was distilled off under vacuum
4. additionthe pH of the residue was adjusted to 1 by addition of concentrated HCl
5. filtrationThe precipitating crystal was recovered by filtration
6. customdried