对甲苯胺合成4-氨基- 3,5 -二溴-甲苯及表征

M. Kaur, C. Saini, Amandeep Kaur
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摘要

邻甲苯胺是一种化学式为CH3C6H4NH2的有机化合物。它是三种异构体甲苯胺中最重要的。它是一种无色液体,尽管商业样品通常是淡黄色的。它是除草剂甲草胺和乙草胺的前体。甲苯,正式名称为甲苯,是一种透明的不溶于水的液体,具有典型的油漆稀释剂气味。材料和方法:化学上,它是一种单取代苯衍生物,即苯分子中的单个氢原子被一价基团取代,在这种情况下是CH3。甲苯作为普通芳香烃发生亲电取代反应。然后利用过滤方法对混合物进行过滤,产品在热风炉中进一步干燥,形成4-氨基- 3,5 -二溴-甲苯作为溴化产品。有机层分离,盐水洗涤一次,硫酸钠干燥得到纯度为98.7%的4-溴甲苯胺。结果和讨论:在这种反应中,甲基使其比苯的反应活性高25倍左右。浓缩产物的熔点为50-52℃。结论:面对可持续和生态友好型有机合成的要求,不使用有害有机溶剂的清洁有机反应工艺受到鼓励,目前需求量很大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
SYNTHESIS AND CHARACTERIZATION OF 4- AMINO-3, 5- DIBROMO- TOLUENE FROM P-TOLUIDINE
Introduction: O-toluidine is an organic compound with the chemical formula CH3C6H4NH2. It is the most important of the three isomer toluidines. It is a colorless liquid although commercial samples are often yellowish. It is a precursor to the herbicides metolachlor and acetochlor. Toluene, formally known as toluol, is a clear, water-insoluble liquid with the typical smell of paint thinners. Materials and Methods: Chemically it is a mono-substituted benzene derivative that is one in which a single hydrogen atom from the benzene molecule has been replaced by a univalent group, in this case, CH3. Toluene reacts as a normal aromatic hydrocarbon towards electrophilic aromatic substitution. Then the mixture is filtered with the help of the filtration method and the product is further dried in a hot air oven and 4- Amino-3, 5- dibromo-toluene is formed as a brominated product. The organic layer was separated and washed once with brine and dried over sodium sulphate to give 4-bromop-toluidine in 98.7% purity. Results and Discussion: The methyl group makes it around 25 times more reactive than benzene in such reactions. The concentrated product’s melting point was 50-52°C. Conclusion: In the face of demands for sustainable and ecologically friendly organic synthesis, clean organic reaction processes which do not use harmful organic solvents are encouraged and are in great demand today.  
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