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本文介绍了环氧氯代烃的两种化学反应:取代反应和开环反应。同时介绍了由环氧氯丙烷制出的心血管药物和抗过敏药物、抗抑郁药等例子。基于作者对甲基环氧氯丙烷的研究,我们又对甲基环氧氯丙烷在药物合成中的应用作了介绍。目前,用环氧氯代烃作原料制备出的药物种类很多,环氧氯代烃具有较好的市场应用潜力。 相似文献
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环氧烷是合成领域中一类重要的中间体,在药物及工业化学品的合成中具有广泛的应用.烯烃通过环氧化反应可以得到环氧烷.本文综述了以烯烃为底物制备环氧烷的相关催化体系,及烯烃的环氧化反应在药物合成中的应用实例. 相似文献
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叙述了合成子法的概念和原理,并通过一些天然产物和药物合成的例子,进行具体分析,使读者了解合成子的概念和应用。 相似文献
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本文以药物合成的热点问题“手性有机小分子催化”为研究对象,介绍小分子催化反应的分类即“亲核性催化”和“亲电性催化活化”;在药物合成方法中主要有外消旋体拆分法、化学-酶合成法、酶催化手性药物合成法、不对称催化法,在药物合成中以形成非共价键活化底物的方式达到催化作用。 相似文献
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液膜分离技术是一种新兴的技术,它是利用混合物各组分渗透性能的差异来实现分离、提纯或浓缩的。介绍了液膜技术的原理及其特点和此技术在生化、医药化工领域的应用,据此提出了液膜技术未来研究的重点及应用途径。 相似文献
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菠萝蛋白酶的提取及其在医药中的应用 总被引:3,自引:0,他引:3
综述了菠萝蛋白酶的三种提取方法,并分析各自的特点,与高岭土吸附法和单宁沉淀法相比,超滤法能使产品质量、纯度、酶活都优于前者,是菠萝蛋白酶升级换代的新工艺。同时,综述了菠萝蛋白酶在医药中的应用,并指出对菠萝蛋白酶进行化学修饰以提高其稳定性和活力是重要的研究方向。 相似文献
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Insoluble β-cyclodextrin polymers were prepared from β-cyclodextrin(β-CD) using epichlorohydrin(EPI) as crosslinking agent under basic conditions.The polymers were characterized by Fourier Transform Infrared(FTIR),Thermogravimetry(TG),X-ray diffraction(XRD) and TG-FTIR.The results demonstrated that the polym-erization between EPI and β-CD indeed occurred,and a number of CD rings were interconnected to form a three-dimensional network.Moreover,different factors influencing the polymerization,e.g.molar ratio of EPI to β-CD,the concentration of NaOH and reaction temperature,have been investigated.The polymer prepared under the optimal conditions(the molar ratio EPI:β-CD of 44,the NaOH concentration 50% in mass,and the temperature at 65 ℃) showed excellent thermal stability and insolubility in organic solvents or strong acid/base.In addition,the β-cyclodextrin polymers also presented high catalytic activity for aqueous oxidation of benzyl alcohol with hy-pochlorite as oxidant. 相似文献
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分析洗油中分离和精制β-甲基萘工艺现状及存在问题,针对亟待解决的问题提出相应方案,总结试验效果。 相似文献
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研究了操作员仿真培训系统(OTS)在环氧氯丙烷装置中的具体应用。介绍了OTS的基本概念及软硬件组成,对环氧氯丙烷工艺流程进行分析并研究了OTS系统的使用流程,总结了研究的成果在实际生产中所带来的经济和社会效益。 相似文献
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Age-related macular degeneration (AMD) is central vision loss with aging, was the fourth main cause of blindness in 2015, and has many risk factors, such as cataract surgery, cigarette smoking, family history, hypertension, obesity, long-term smart device usage, etc. AMD is classified into three categories: normal AMD, early AMD, and late AMD, based on angiogenesis in the retina, and can be determined by bis-retinoid N-retinyl-N-retinylidene ethanolamine (A2E)-epoxides from the reaction of A2E and blue light. During the reaction of A2E and blue light, reactive oxygen species (ROS) are synthesized, which gather inflammatory factors, induce carbonyl stress, and finally stimulate the death of retinal pigment epitheliums (RPEs). There are several medications for AMD, such as device-based therapy, anti-inflammatory drugs, anti-VEGFs, and natural products. For device-based therapy, two methods are used: prophylactic laser therapy (photocoagulation laser therapy) and photodynamic therapy. Anti-inflammatory drugs consist of corticosteroids and non-steroidal anti-inflammatory drugs (NSAIDs). Anti-VEGFs are classified antibodies for VEGF, aptamer, soluble receptor, VEGF receptor-1 and -2 antibody, and VEGF receptor tyrosine kinase inhibitor. Finally, additional AMD drug candidates are derived from natural products. For each medication, there are several and severe adverse effects, but natural products have a potency as AMD drugs, as they have been used as culinary materials and/or traditional medicines for a long time. Their major application route is oral administration, and they can be combined with device-based therapy, anti-inflammatory drugs, and anti-VEGFs. In general, AMD drug candidates from natural products are more effective at treating early and intermediate AMD. However, further study is needed to evaluate their efficacy and to investigate their therapeutic mechanisms. 相似文献
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聚环氧氯丙烷胺的制备及其脱色性能 总被引:8,自引:0,他引:8
以环氧氯丙烷和二甲胺为原料,加入交联剂乙二胺制得了一系列有机阳离子聚合物,研究了乙二胺加入量、反应温度、环氧氯丙烷和二甲胺摩尔比、聚合时间等对产品黏度的影响。利用红外光谱,1HNMR和13CNMR对聚合物的结构进行了表征。并对模拟染料废水和实际印染废水进行了脱色效果实验。结果表明,反应温度为70℃,n(环氧氯丙烷)/n(二甲胺)=1.5,n(乙二胺)/n(环氧氯丙烷+二甲胺)=0.03,反应时间7 h时,聚合物黏度最大达750 mPa.s,对实际印染废水的脱色率达75%。 相似文献