| N，N＇－二烃基硫脲的新法合成 |
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| 引用本文： | 蒋玉仁,薛玉兰,王淀佐.N，N＇－二烃基硫脲的新法合成[J].湖南师范大学自然科学学报,1994(1). |
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| 作者姓名： | 蒋玉仁 薛玉兰 王淀佐 |
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| 作者单位： | 中南工业大学矿物工程系 |
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| 摘 要： | 本文首次报道了超声波辐射和极性非质子溶剂在硫脲与溴代烷反应合成二烃基硫脲中的应用。试验结果表明通常情况下硫脲与溴代烷反应产物主要是以硫原子进攻生成的烃基异硫脲盐，产率９０％以上。当反应体系中加入极性非质子溶剂，并施加超声波辐射后，反应产物以氮原子进攻生成的二烷基硫脲为主，选择性高达８９％，产率８０％以上，且反应不需加热，在室温甚至低于室温就能迅速进行，反应时间成倍缩短。文中还报道了温度对反应产率及选择性的影响。
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| 关 键 词： | 超声波辐射 极性非质子溶剂 硫脲 二烃基硫脲 合成 |
Synthesis of N,N'-Dialkyl Thiourea by New Method |
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| Jiang Yuren, Xue yuran, Wang Dianzhuo.Synthesis of N,N''''-Dialkyl Thiourea by New Method[J].Journal of Natural Science of Hunan Normal University,1994(1). |
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| Authors: | Jiang Yuren Xue yuran Wang Dianzhuo |
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| Abstract: | The application of ultrasonic radiation and polar aprotic solvent in the synthesis of dialkyl thiourea with NH_2C(=S)NH_2 and RBr was studied in this paper for the first time.Generally RSC(NH_2)_2]Br was the main product with a yield of over 90%.Especially,RNHC(=S)NHR was the main product with a high selectivity of 89% as well as a yield of over 80% when the reaction system was radiated by ultrasound and in the presence of polar aprotic solvent such as DMSO. Not only did the reaction need no heat but also the reaction time was remarkably shortened.The effect of temperature on yield and sectivity was also studied in the paper. |
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| Keywords: | ultrasonic radiation polar aprotic solvent thiourea dialkyl thiourea synthesis |
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