Refining method of valnemulin hydrochloride
A technology of vonimulin hydrochloride and a refining method, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of sulfides, etc., can solve the problems of high equipment cost, difficulty in solvent recovery, physical injury of operators, etc. The use of expensive equipment, obvious purification effect, and the effect of reducing production costs
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Embodiment 1
[0021] Take 500ml of the methyl tert-butyl ether solution of vonimoulin base with a mass-volume concentration of 5%, add 0.5 times the volume of the above solution (ie 250ml purified water), heat to 40℃, stir for 0.5h, Set the layers, take the upper organic phase, and discard the lower aqueous phase. Add 600 ml of ethanol solution with a mass volume concentration of 10% to the organic phase, stir at room temperature for 0.5 h, stand still for layering, take the upper organic phase, and discard the lower aqueous phase. Pour dry hydrogen chloride gas into the organic layer obtained above, stir slowly at room temperature for 2 hours, and precipitate a large amount of crystals. At a rate of 5°C per hour, slowly lower the temperature to 0°C to complete the crystallization. The precipitated product is filtered. After drying, the solid product of Vonimulin Hydrochloride is obtained. Product yield: 99%. Purity: 99.8%. Moisture: 1.2%. Residual solvent: 6.2?? g / ml. Total impurities:...
Embodiment 2
[0023] Take 500ml of the methyl tert-butyl ether solution of Vonimulin base with a mass-volume concentration of 6%, add 300ml of purified water, heat to 40℃, stir for 1h, stand still for layering, take the upper organic phase, and discard the lower layer water box. Add 500 ml of ethanol solution with a mass volume concentration of 13% to the organic layer, stir at room temperature for 0.5 h, stand still for layering, take the upper organic phase, and discard the lower aqueous phase. Pour dry hydrogen chloride gas into the organic layer obtained above, stir slowly at room temperature for 3 hours, and precipitate a large amount of crystals. At a rate of 4°C per hour, slowly lower the temperature to 0°C to complete the crystallization. Filter the precipitated product. After drying, the solid product of Vonimulin Hydrochloride is obtained. Product yield: 98%. Purity: 99.2%. Moisture: 1.5%. Residual solvent: 5.6?? g / ml. Total impurities: less than 0.8%.
Embodiment 3
[0025] Take 500ml of the methyl tert-butyl ether solution of Vonimulin base with a mass-volume concentration of 7%, add 300ml of purified water, heat to 50℃, stir for 1h, stand still for layering, take the upper organic phase, and discard the lower layer water box. Add 700 ml of an ethanol solution with a mass volume concentration of 15% to the organic layer, stir at room temperature for 1 h, stand still for layering, take the upper organic phase, and discard the lower aqueous phase. Pour dry hydrogen chloride gas into the organic layer obtained above, stir slowly at room temperature for 3 hours, and precipitate a large amount of crystals. At a rate of 5°C per hour, slowly lower the temperature to 0°C and complete the crystallization. The precipitated product is filtered. After drying, the solid product of Vonimulin Hydrochloride is obtained. Product yield: 98.8%. Purity: 98.9%. Moisture: 1.8%. Residual solvent: 8.9?? g / ml. Total impurities: less than 1%.
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