Thiocarbamate compound preparation method
A technology for thiocarbamic acid and ester compounds, applied in the direction of organic chemistry and the like, can solve the problems of cumbersome process, high production cost, poor operating environment, etc., and achieve the effects of improving environmental pollution, stable product quality, and improving production efficiency.
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[0027] Example one
[0028] Dissolve 0.1 mol of isopropylxanthate with a purity greater than 80.0% in 20 ml of water, then add 0.1-0.2 mol of ethylamine and an appropriate amount of manganese acetate as a catalyst (the amount of catalyst is 1% of the molar amount of xanthate) and triethylamine , React for 1 hour at 30-35°C with stirring, then heat up to 50°C, and continue to keep the temperature for 1 to 4 hours;
[0029] Then the reaction solution was filtered, 50 ml of ethyl acetate was added to the filtrate as an organic extractant for extraction, and the aqueous phase was removed by standing for liquid separation; the organic phase was distilled under reduced pressure to remove ethyl acetate as the organic extractant, and the rest was Target product thiocarbamate; analysis shows that the yield of the product is over 92.0% and the purity is 98.2%.
Example Embodiment
[0030] Example two
[0031] Dissolve 0.1 mole of isobutyl xanthate with a purity greater than 80.0% in 20 ml of water, then add 0.1 to 0.2 mole of ethylamine, add an appropriate amount of manganese acetate as a catalyst (the amount of catalyst is 1% of the molar amount of xanthate) and triethyl The amine is reacted at 30-35°C for 1 hour under stirring, then the temperature is raised to 50°C, and the temperature is kept for 1 to 4 hours. Then the reaction solution was filtered, and 50 ml of ethyl acetate was added to the filtrate as the organic extractant for extraction. The aqueous phase was removed by static separation, and the organic phase was distilled under reduced pressure to remove ethyl acetate as the organic extractant. The target product thiocarbamate; analysis shows that the yield of the product is over 90.0% and the purity is 97.9%.
Example Embodiment
[0032] Example three
[0033] Dissolve 0.1 mol of isopropyl xanthate with a purity greater than 80.0% in 20 ml of water, then add 0.1 to 0.2 mol of ethylamine, add an appropriate amount of active manganese dioxide as a catalyst (the amount of catalyst is 5% of the molar amount of xanthate), stir React at 30-35°C for 1 hour, then heat to 50°C, and continue to keep the temperature for 1 to 4 hours;
[0034] Then the reaction solution was filtered, 50 ml of ethyl acetate was added to the filtrate as an organic extractant for extraction, and the aqueous phase was removed by standing for liquid separation; the organic phase was distilled under reduced pressure to remove ethyl acetate as the organic extractant, and the rest was The target product thiocarbamate; analysis shows that the yield of the product is over 82.0% and the purity is 98.0%.
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