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- Cycloaddition reacton 环加成反应
- The cycloaddition itself is the slow step. 环化作用本身是慢的一步。
- Investigations on [2+1] cycloaddition to [60] fullerene are reviewed. 对[60]富勒烯的[2+1]环加成反应、主要试剂及反应机理进行了综述。
- The production and application technology of PTFE as the anti-corrosive liner of the chemical reacton is slressly introduced. 重点介绍聚四氟乙烯用于化工反应釜防腐衬里的生产和应用。
- Quantum Chemistry Study on Cycloaddition Reaction of Germylene X_2Ge(X=H,CH_3,F,Cl,Br ) and Ethylene? 锗烯X_2Ge(X=H、CH_3、F、Cl、Br)与乙烯环加成反应的量子化学研究
- On the basis of this, 1,3-dipolar cycloaddition reactions were studied using imine esters as the starting marerials. 在此基础上以氨基酸酯亚胺类化合物为原料主要研究了1,3-偶极子环加成反应。
- Recently, the modification of porphyrin by 1,3-dipolar cycloaddition is studied intensively. 摘要利用1,3-偶极环加成反应对卟啉大环进行修饰是近年来卟啉研究的一个新热点。
- Nonphosgenation methods, especially reaction between IPDA and DMC, are clean production processes with mild reacton condition as well as satisfactory conversion and selectivity. 传统光气法收率高;但毒性大;非光气法特别是DMC法反应条件温和;环境污染小;虽比光气法生产成本增加了5.;45%25;但仍然具有广泛的工业化应用前景。
- Endo and exo cycloaddition products (15)( 16) were obtained when (14) was cyclized by the catalysis of BF_3.Et_2Oat room temperature. Lewis acid(BF3.;Et2O)催化化合物(14)进行IMDA反应，分离得到endo和exo两种环合产物，(15)和(16)；
- Investigations on [2+3] cycloaddition to [60]fullerene are reviewed. The main reagents used in cycloaddition and the reaction mechanisms are surveyed. 对[60]富勒烯[2+3]环加成反应的研究进展进行了综述;并介绍了在环加成反应中使用的主要试剂及反应机理.
- The system of [4+3] cycloaddition and its application in organic synthesis are reviewed. A brief discussion about the future research is also given. 本文对[4+3]环加成反应体系以及最近在合成中的应用进行了综述,并对进一步研究的方向进行了讨论。
- This paper focuses on the cycloaddition reactions on solid phase supports and their applications in organic synthesis and mechanism research. 本文介绍了在固相载体上进行的环加成反应，及其在有机合成及反应机理研究中的应用。
- Due to the C3=C4 double bond, coumarins may undergo [2+2] cycloaddition and most of this kind of compounds have symmetry center. 香豆素类化合物由于存在C3=C4键,有可能发生[2+2]环加成反应,在此类化合物中,大多数晶体都采用中心对称的形式。
- Investigations on reaction of the three-membered cycloaddition to [60] fullerene and functions of their derivatives were reviewed. 对[60]富勒烯的三元环化反应及其衍生物的功能研究进行了概述,讨论了[60]富勒烯的三元环化反应的发生机理。
- The results showed that there were 8cases with Al positive reaction and 7 cases with Fn positive reacton in SMDS group,all of 7 cases withAl and Fn positive reaction in coronary heart disease group,no Al and Fn reaction in normal controlgroup. 冠心病组，7例Al、Fn均呈阳性染色； 非心脏病组心肌细胞内Al、Fn均呈阴性，而部分血管壁、结缔组织则呈阳性。
- According to the morphological characteristics and biochemical reacton and sugar fermentation characteristics, they respectively belonged to Lactococcus 5 genus, Lactobacillus 6 genus, yeasts 6 genus. 结果表明,酸马奶酒是由多种乳酸菌和酵母菌共同发酵的乳饮料。其中乳酸菌中有球菌5个属,杆菌6个属,酵母菌6个属。
- Fatty acid methyl ester and glycerol (single or double) ester,the fatliquoring intermediates are prepared through ester_exchange reacton which is catalysised by anion layer and pillar materials. 采用阴离子层柱材料作催化剂，以菜油为原料进行酯交换反应，制得脂肪酸甲酯、甘油单双酯，作为皮革加脂剂合成的中间体。
- This paper presents applications of andes insynthesis of heterocyclic compounds.They include cyclization of azides, cycloaddition of andes, ringexpansions and contractions. 利用叠氨化合物合成杂环化合物的新方法，包括环化、环加成、扩环和缩环反应。
- Meanwhile the mechanism of the intramolecular cycloaddition of cis, cis-1, 5-cyclooctadiene to tricyclo [3.3.0.0~(2,6)]-octane under >250nm irradiation is also discussed. 对在大于250nm光波照射下;顺;顺-1;5-环辛二烯分子内环加成形成三环-[3.;3
- This article introduced linseed oil and maleic anhydride [4 + 2] cycloaddition reaction principleand operation. This product is suitable for hardener of epoxy resin. 本文介绍亚麻油与顺丁烯二酸酐（4+2）环加成反应原理和操作，产物运作环氧树脂固化剂。
