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- These two isomers, that possess the altered positions of nitrogen and oxygen atoms, can be formed through dipolar cycloaddition reactions of the appropriate olefins and nitrile oxides. 英文摘要： Isoxazoline rings have been successfully connected to imidazopyridine derivatives via carbon-carbon bonds for the synthesis of new C-nucleoside analogs 3 and 4.
- Keywords dipolar cycloaddition;spiro heterocycle;synthesis; 偶极环加成;杂螺环化合物;合成;
- Keywords Fullerene;1;3 - Dipolar Cycloaddition;Pyrrolidine;Azomethine Ylide; 富勒烯;1;3-偶极环加成反应;吡咯烷;亚胺叶立德;
- The reaction mechanism, thermodynamic and kinetic behavior of the dipole cycloaddition reaction of benzaldoxime with propinol have been studied by DFT method at B3LYP/6-31G* level. 用密度泛函理论(DFT)方法在B3LYP/6-31G*水平上研究了苯甲醛肟与炔丙醇加成反应的微观机制和热力学、动力学行为。
- Keywords soluble polymer;（diacetoxy）iodobezene;aldehyde phenylhydrazones;nitrilimines;pyrazoline;1;3 dipolar cycloaddition; 可溶性聚合物;二醋酸碘苯;醛的苯基腙;腈亚胺;啉唑啉;1;3-偶极环加成;
- dipolar cycloaddition 偶极环化加成
- 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。
- 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。
- Method:Observe and test the heart functions of normal domestic cats before and after the medicine ASU-DIC colorful dipolar ultrasonic diagnosis Set. 方法:用ASU-DIC型彩色多普勒超声诊断仪观察测定给药前后家猫心功能。
- 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)；
- This strategy was run in the isotopically enriched polymer blends using dipolar filter under fast magic angle spinning. 在以往研究的基础上，发展了一套在分子尺度上表征玻璃态高分子链互穿的方法。
- The dipolar layer is consisted of the latent electrostatic image and toner attracted on it. 这偶极层是由静电潜像的电荷和由静电力吸附在上面的色粉构成的。
- 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.
- Examples include: self gravitating systems，plasmas, dipolar magnets and wave-particle interactions. 包括了：引力系统，等离子体系统，偶极磁铁系统等。
- Then, combined with grids search in small area, the accurate dipolar source localization was performed. 然后，再在小范围内进行小网格的搜索，进一步实现精确的定位。
- 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。
