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1.
许家喜  杨俊海 《合成化学》1998,6(3):248-254
综述了固相法合成糖肽的最新进展,论述了合成策略和所用聚合物载体,这是一种很有前途的合成糖肽的方法,参考文献42篇。  相似文献   

2.
本文综述了重要的手性有机硼试剂的合成,反应,机理及其在不对称合成中的应用。  相似文献   

3.
微波合成SrTiO3的工艺、结构与性能研究   总被引:8,自引:1,他引:8  
应用微波会成这一材料合成新方法制备SrTiO3,研究了不同工艺条件下微波合成产物的结构,确定出制备纯净SrTiIO。的合成条件.对微波合成的工艺及其影响因素进行详细的探索,从合成产物的显微结构、粒度分布、比表面积、烧结性能等方面比较了微波合成与常规固相合成的差别,结果表明微波合成与各种常规方法相比有合成时间短、合成工艺简单、合成产物性能好等特点,是一种有发展潜力的材料合成技术.  相似文献   

4.
碳酸二乙酯的合成方法   总被引:20,自引:0,他引:20  
碳酸二乙酯是绿色的化工原料和合成中间体,具有很高的工业应用价值,它的合成受到国内外研究者的极大重视。本文简述了近些年来碳酸二乙酯合成方法的研究进展,介绍了光气法、酯交换法、氧化羰基化法、脱羰基法、二氧化碳直接合成法以及生化法的优缺点,并着重介绍了乙醇氧化羰基合成法。  相似文献   

5.
MCM-22分子筛的合成及其性质研究   总被引:2,自引:0,他引:2  
谢素娟  徐龙伢  王清遐 《化学通报》2003,66(10):651-653
以己内酰胺催化加氢得到的有机混合物水溶液(OMS)为模板剂合成了纯MCM-22分子筛,考察了晶化条件对合成产物的影响。采用XRD、SEM和NH3-TPD对所合成MCM-22分子筛的性质进行了研究。结果表明,原料碱度是影响合成产物的重要因素,合成纯MCM-22的硅铝比范围不大,同时原料中水含量对合成产物的影响也不容忽视;改变硅铝比及水蒸气处理可以调节MCM-22分子筛的酸性。  相似文献   

6.
液相组合化学   总被引:5,自引:0,他引:5  
许家喜  麻远 《化学通报》2002,65(3):145-152
综述了液相组合化学的研究进展,重点介绍了液相组合合成中的分离纯化方法和合成方法策略,基本分离纯化方法包括利用固相载体协助分离纯化法,相萃取分离纯化法和色谱法,主要合成方法策略有平行合成策略和索引合成策略。  相似文献   

7.
本文概述了甲基磺酰氯的合成方法,作者对以硫脲为原料的合成工艺进行了深入的研究,改进后的合成工艺使产品产率提高了10%。  相似文献   

8.
一种高效驱蚊剂的合成高明章(西江大学轻工化学系肇庆526061)关键词驱蚊剂DETA合成中图分类号O625.5为了驱避蚊虫,人们进行了多年的研究,合成了许多驱蚊剂,到1975年止,各国合成和试验过的化合物就有2500种以上[1]。其中N,N-二乙基间...  相似文献   

9.
本文研究了环状膦酸酯的合成方法,通过三种方法合成了十五个具有各种烷基结构的六元和七元环膦酸酯,并对这十五个化合物质谱作了分析和归纳,得出了一些有助于鉴定这类膦酸酯的质谱特征。  相似文献   

10.
阚显文  赵广超  胡斌  方宾 《合成化学》2002,10(5):391-396
综述了药物中间体电合成技术的研究,从直接电合成、间接电合成、成对电合成及超声电合成法四个方面介绍了电合成技术在药物中间体合成中的应用。参考文献43篇。  相似文献   

11.
紫杉醇研究进展   总被引:18,自引:0,他引:18  
紫杉醇是目前最新的具有很好疗效的抗癌药物, 本文对自紫杉醇发现以来的最新研究进展进行了比较详尽的综述。包括以下几个部分: 1.紫杉醇的发现和历史; 2. 紫杉醇的来源; 3. 紫杉醇的全合成研究; 4. 紫杉醇的生物合成; 5. 通过真菌生产紫杉醇; 6.通过植物细胞培养生产紫杉醇; 7. 紫杉醇化学研究的展望。  相似文献   

12.
抗癌药物紫杉醇的制备、抗癌机理和应用前景   总被引:6,自引:0,他引:6  
张英锋  范林 《化学教育》2007,28(1):7-10
紫杉醇具有显著的抗癌活性和独特的作用机理,现主要用于治疗晚期乳腺癌和卵巢癌等。紫杉醇分子结构复杂,具有特殊的三环[6+8+6]碳架和桥头双键以及众多的含氧取代基,其全合成引起国内外许多有机化学家的兴趣。本文简述紫杉醇的制备、抗癌机理和不良反应。  相似文献   

13.
A 36‐step synthesis was carried out in automated synthesizers to provide a synthetic key intermediate of taxol. A key step involved a microwave‐assisted alkylation reaction to construct the ABC ring system from an AC precursor. Subsequent formation of the D ring afforded baccatin III, a well‐known precursor of taxol.  相似文献   

14.
BACKGROUND: The binding of somatostatin (SST) to endogenous G-protein-coupled receptors (SST receptors or SSTRs) is followed by internalization of SST, and, several reports have shown that a high density of SSTRs is present on most hormone-secreting tissue tumors. Facile synthesis of the long-acting SST analog, octreotide, has previously been described. Octreotide might be of practical value in developing tumor tracers and in serving as a carrier of cytotoxic antitumor drugs. RESULTS: Fluorescein-labeled octreotide was internalized into the cytosol of human breast MCF-7 carcinoma cells via binding to SSTRs. Octreotide-conjugated paclitaxel (taxol) was created by coupling taxol-succinate to the amino-terminal end of octreotide. This conjugate retains the biological activity of taxol in inducing formation of tubulin bundles, eventually causing apoptosis of MCF-7 cells. Cytotoxicity of octreotide-conjugated taxol is mainly mediated by SSTR, as shown by the observation that octreotide pretreatment can rescue the induced cell death. In comparison with free taxol, this conjugate shows much less toxicity in Chinese hamster ovary cells. CONCLUSIONS: Octreotide-conjugated taxol exerts the same antitumor effect of free taxol on stabilizing microtubule formation and inducing cell death. This conjugate triggers tumor cell apoptosis mediated by SSTRs and is exclusively toxic to SSTR-expressing cells. Octreotide-conjugated taxol is less toxic to low-SSTR-expressing cells compared with free taxol. Our results strongly indicated that octreotide-conjugated taxol demonstrates cell selectivity and may be used as a targeting agent for cancer therapy.  相似文献   

15.
Utsugi M  Miyano M  Nakada M 《Organic letters》2006,8(14):2973-2976
[reaction: see text] The highly stereoselective construction of the C3 stereogenic center of the taxol C-ring is described. The trans isomer at the C3-C8 position of the taxol C-ring, which is required for the total synthesis, as well as its diastereomeric cis isomer were successfully synthesized with highly diastereoselective S(N)2' reduction of the allylic phosphonium salts.  相似文献   

16.
A formal total synthesis of (?)‐taxol by a convergent approach utilizing Pd‐catalyzed intramolecular alkenylation is described. Formation of the eight‐membered carbocyclic ring has been a problem in the convergent total synthesis of taxol but it was solved by the Pd‐catalyzed intramolecular alkenylation of a methyl ketone affording the cyclized product in excellent yield (97 %), indicating the high efficiency of the Pd‐catalyzed intramolecular alkenylation. Rearrangement of the epoxy benzyl ether through a 1,5‐hydride shift, generating the C3 stereogenic center and subsequently forming the C1–C2 benzylidene, was discovered and utilized in the preparation of a substrate for the Pd‐catalyzed reaction.  相似文献   

17.
抗癌药物紫杉醇的全合成-Nicolaou法合合成紫杉醇的剖析   总被引:2,自引:0,他引:2  
徐亮  王锋鹏 《有机化学》2001,21(7):493-504
介绍和剖析了用Micolaou法全合成紫杉醇的方法,包括合成的战略和路线,关键反应和保护基的应用等。  相似文献   

18.
The synthesis of the C-13 side-chain of taxol has been achieved using Shibasaki's asymmetric Henry reaction catalyzed by an optically active rare earth lanthanum-(R)-binaphthol complex.  相似文献   

19.
A library of paclitaxel (taxol) mimics was obtained by a straightforward strategy involving rational design and an efficient synthesis of a simplified taxane core substitute, together with a click-chemistry combinatorial search for phenylisoserine side-chain surrogates.  相似文献   

20.
With a similar mechanism of action to taxol, the title compound 1 is a particularly promising candidate for development in cancer chemotherapy. This efficient synthesis, based on stereocontrolled aldol reactions, should help to overcome the scarce natural supply of 1 from the rare sponge source.  相似文献   

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