32750-89-3Relevant academic research and scientific papers
Dialkyl dithiocarbamate ester synthesis method
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Paragraph 0024; 0025, (2017/02/17)
The invention relates to the technical field of flotation reagents synthesis and discloses a dialkyl dithiocarbamate ester synthesis method. The dialkyl dithiocarbamate ester synthesis method includes: adding carbon disulfide and alpha and beta-unsaturated compounds and appropriate solvents into a reaction vessel, wherein the molar ratio of the carbon disulfide to the alpha and beta-unsaturated compounds is 1.0-2.0:1; slowly dropping amine into the reaction vessel according to the molar ratio of the amine to the alpha and beta-unsaturated compounds being 1.0-1.5:1, controlling the dropping speed in 0.5-1mL/min, performing cooling and stirring to control reaction temperature to be not exceeding 20DEG C; after dropping and exothermic reaction are completed, keeping warm under the condition of 30-60DEG C prior to stirring for 1-5 hours to obtain a crude product; decompressing the solvent in the crude product to obtain the qualified dialkyl dithiocarbamate ester compound product. The dialkyl dithiocarbamate ester synthesis method has the advantages of easily-obtained raw materials, convenience in operation, moderate reaction condition, high yield, good chemical selectivity, suitable for industrial production and the like.
Synthetic method of N,N-dibutyl dithio methyl acrylate sulfur-nitrogen ester
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Paragraph 0016-0017, (2017/04/19)
The invention relates to the technical field of floating agent synthesis, and discloses a synthetic method of N,N-dibutyl dithio methyl acrylate sulfur-nitrogen ester. The synthetic method comprises the following steps: mixing and adding 26-32 parts of carbon disulfide and 20-32 parts of methyl acrylate into a reaction container; then dropwise adding 40-52 parts of di-n-butylamine into the reaction container slowly, cooling and stirring, wherein the dropping speed is controlled to be 0.5-1 mL/min, and the reaction temperature is controlled to be not more than 20 DEG C; after the adding and an exothermic reaction are finished, preserving the temperature under the condition of 30-50 DEG C, and stirring for 1-2 h to obtain a crude product; obtaining excessive carbon disulfide in the crude product through reduced pressure distillation so as to obtain a qualified N,N-dibutyl dithio methyl acrylate sulfur-nitrogen ester product. The N,N-dibutyl dithio methyl acrylate sulfur-nitrogen ester is synthetized in one step by using the raw materials such as the carbon disulfide, the methyl acrylate and the di-n-butylamine, and the di-n-butylamine directly acts with the carbon disulfide without an intermediate product, so that the synthetic process is simple, high in efficiency, low in cost, green and environment-friendly.
OH-/silica-mediated one-pot synthesis of dithiocarbamates under solvent-free conditions
Bardajee, Ghasem Rezanejade,Afsari, Hamid Samareh,Sadraei, Seyediraj,Taimoory, Seyedehmaryamdokht
experimental part, p. 871 - 878 (2012/07/31)
An efficient, versatile, and environmentally benign method for the synthesis of dithiocarbamates under solvent-free conditions is reported. The Michael addition of electron-deficient alkenes with alkyl or aryl amines and CS2 in the presence of OH-/silica in a one-pot three-component reaction protocol gave the corresponding dithiocarbamates in good to excellent yields. This method is suitable for a wide range of amines and a variety of Michael acceptors in solvent-free conditions. The results of the present work show the desired products in excellent yields. Copyright Taylor and Francis Group, LLC 2012.
An efficient synthesis of aryldithiocarbamic acid esters from Michael addition of electron-deficient alkenes with arylamines and CS2 in solid media alkaline Al2O3
Xia, Shuai,Wang, Xin,Ge, Ze-mei,Cheng, Tie-ming,Li, Run-tao
experimental part, p. 1005 - 1009 (2009/04/10)
An efficient synthesis of dithiocarbamic acid esters from Michael addition of electron-deficient alkenes with arylamines and CS2 in solid media alkaline Al2O3 was presented. This method was suitable for a wide range of amines and a variety of Michael receptors. Specially, a series of aryldithiocarbamic acid esters was obtained from arylamines through this method. The protocol offers clean reactions and high yields with simple experimental procedures. Besides, the alkaline Al2O3 could be reused.
