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Schiff 碱及其配合物在催化剂领域、医药和农药领域、缓蚀剂领域、新材料开发和研制领域等都得到了广泛应用，而对氨基苯甲酸乙酯是一种重要的医药中间体，它在医药上用作局部麻醉剂。 首先，以对硝基苯甲酸和乙醇为原料在浓硫酸的催化下用回流的方式酯化合成对硝基苯甲酸乙酯。然后，对硝基苯甲酸乙酯为原料，Zn粉为还原剂，并加入适量醋酸，还原制备得对氨基苯甲酸乙酯。最后，用糠醛和对氨基苯甲酸乙酯缩合反应生成糠醛缩对氨基苯甲酸乙酯。 本文探讨了酯化的优化条件;同时优化了Zn粉还原工艺，总结出制备苯佐卡因的最佳工艺条件;最后对比了缩合条件，最终完成了糠醛缩对氨基苯甲酸乙酯的合成。通过红外光谱，物理分析等方法确定为目标产物。 专业点的，不要网上直接翻译过来的，谢谢 |
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灿灿妹
至尊木虫 (著名写手)
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爱与雨下: 金币+1 2015-05-27 18:50:32
yxj447836164: 金币+20, 翻译EPI+1 2015-05-28 13:07:16
爱与雨下: 金币+1 2015-05-27 18:50:32
yxj447836164: 金币+20, 翻译EPI+1 2015-05-28 13:07:16
| Schiff base and its complexes were widely used in the fields of catalyst, pharmaceuticals and agrochemicals, corrosion inhibitor, new materials development and design, etc. While, ethyl p-aminobenzoate, an important pharmaceutical intermediate, was used as local anesthetics in medicine. |
2楼2015-05-27 13:57:22
灿灿妹
至尊木虫 (著名写手)
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Firstly, ethyl p-nitrobenzoate was synthesised by esterification under the conditions of refluxing pattern of using p-nitrobenzoic acid and ethyl alcohol as raw material and concentrated sulfuric acid as catalyst. Then, combined with Zn power as reductant and proper acetic acid addition, the obtained ethyl p-nitrobenzoate was used as raw material to prepare ethyl p-aminobenzoate. Finally, furfural ethyl p-aminobenzoate were synthesized by the condensation reactions of ethyl p-aminobenzoate with furfural . For summarizing the optimal technological condition of ethyl aminobenzoate preparation, the optimization condition of esterification was discussed in this paper, and Zn power reduction procedure has optimized at the same time. The condensation conditions were finally compared to accomplish the synthesis of furfural ethyl p-aminobenzoate. The target product was determined by infrared by methods of spectroscopy and physical analysis. |
3楼2015-05-27 14:28:20
