开环反应

分别使用沉积法和直接反应镀层法，在微反应管道内负载了金属－有机骨架材料HKUST-1和丙二酸铜作为Lewis酸催化剂，进行了氧化苯乙烯的固－液相催化开环反应。

Using the coating deposition and direct reaction method , the metal - organic framework HKUST-1 and copper (ⅱ) malonate were loaded in the steel pipeline as Lewis acid catalysts for the solid - liquid phase catalytic ring opening reaction .

芳烃加氢饱和及开环反应是一种提高柴油十六烷值的有效途径。

Its hydrogenation activity in aromatics saturation and ring opening activity were investigated .

FTIR谱图表明，淀粉与十二醇进行了苷化反应生成淀粉十二烷基苷，同时还发生了降解反应、开环反应。

FTIR results show that the glycosidation reaction is accompanied by ring-opening reaction and degradation reaction .

TS-1催化丙烯环氧化过程中环氧丙烷的开环反应研究

Study on ring-opening of propylene oxide in epoxidation of propylene catalyzed by TS-1

92.00g八甲基环四硅氧烷（D4）在碱性条件下，120℃，N2保护，开环反应1h；

Ring-opening reaction was conducted with 92.00 g octamethylcyclotetrasiloxane ( D_4 ) and KOH under N_2 protection at 120 ℃ for 1 h.

PO在载体和未还原催化剂上的吸附行为表明，PO与载体的硅羟基有强相互作用，PO发生开环反应生成开环物种。

When PO is adsorbed on the support and unreduced catalyst , a ring-open reaction occurs through the interaction of PO with Si-OH on the support surface .

八甲基环四硅氧烷（D4）是有机硅工业中的一类重要原材料，通过预乳化和开环反应，合成了D4聚硅氧烷；

Octamethylcyclotetrasiloxane ( D4 ) was first selected as a modified organosilicon monomer which was used to synthesis of OH ~ & terminated polysiloxane .

重新研究了Lewis酸催化的甾体皂甙元E/F螺环乙酰化开环反应，并通过波谱分析和单晶X衍射修正了原指定结构。

Lewis acid catalyzed acetylation of steroidal sapogenin was reinvestigated , and the previous assigned structures A , B and C of E / F ring opening products were rectified as 1 , 2 and 3 according to X ray diffraction analysis .

同时，提出了PO开环反应及2-氯-1-丙醇氨解反应的反应机理，合理地解释了第一步反应中，反应主要产物是1-氯-2-丙醇，而不是2-氯-1-丙醇的实验结果。

At the same time , the mechanism about the ring-opening reaction and aminolysis reaction has been investigated and the experimental results in first step reaction which the main product is 1-Chloro-2-propanol but 2-Chloro-1-propanol have been explained rationally .

通过比较反应物和产物31PNMR，13cNMR及DEPT，得出了开环反应是发生在五元环的端碳原子上。

Comparing the ~ ( 31 ) PNMR , ~ ( 13 ) C NMR and DEPT of reactant with those of ring-opening products , we reached the conclusion that the nucleophilic opening ring occurred at the terminal carbon having less stereo-hindrance .

它与环氧树脂混合后首先形成过渡状态，然后按双分子亲核取代（SN2）机理进行开环反应。

After it was mixed with epoxy resin , transition state was formed first . Then they got on with opening ring reactions according to bimolecular nucleophilic substitution mechanism ( S N2 ) .

实验证明：以甲醇为溶剂，在聚乙二醇（PEG-1500）相转移催化剂存在下，开环反应在室温下可以顺利发生，生成预期的目标化合物。

It was indicated that in the present of methanol under room temperature , the target compound could be synthesized successfully under the phase-transfering catalyzer polyglycol ( PEG-1500 ) .

以水合硝酸铝（Al（NO3）3·9H2O）为前驱体，通过乙醇介质中环氧丙烷的开环反应促使形成了透明的块状氧化铝凝胶。

A simple procedure based on gelatification , promoted by the ring-opening reaction of propylene oxide , was proposed for the synthesis of alumina , in which hydrated aluminium nitrate ( Al ( NO3 ) 3 · 9H2O ) was mixed with propylene oxide and gelated in ethanol solvent .

二者的热分解活化能都表明开环反应是速度控制步骤。

Opening ring reaction for two compounds controls the decomposition rate .

论咪唑啉还原开环反应在有机合成中的应用

Application of Imidazoline Reduction Ring - opening Reaction In Organic Synthesis

本文研究探讨了端环氧基聚醚树脂合成反应中催化剂类型、用量、反应物配比和反应温度对开环反应以及环氧化反应的影响，并寻求了合适的工艺条件。

The reaction of preparating polyether resin ending with epoxy is discussed .

非对称氮杂环丙烷的亲核开环反应及其区域选择性

Nucleophilic Ring Opening Reaction of Unsymmetric Aziridines and Its Regioselectivity

三氯化钐促进的芳香胺对氮丙啶的开环反应

The Ring Opening Reaction of Aziridine with Aromatic Amines Promoted by Samarium Trichloride

胍催化下环氧化合物的开环反应

Ring-opening Reaction of Terminal Epoxides Catalyzed by Substituted Guanidine

甲酸－环氧油开环反应机理和动力学研究

The Mechanism and Kinetics of Oxirane Ring cleavage in Epoxidized Oil with Formic Acid

本文主要研究了一种利用氮杂环丙烷开环反应合成邻位氨基醇的有机新反应。

This paper reports a new green ring opening reactions of aziridines with H_2O .

本论文第二部分的内容为氮杂氧三元环的选择性开环反应研究。

The second part of this thesis is about the selective ring-open reaction of oxaziridine .

环氧基活化凝胶的开环反应

Ring-opening Reaction on Epoxy - activated Resin

环氧丙烷在盐酸中开环反应的机理

Ring-opening Reaction of Methyloxirane in HCl Solutions

对开环反应机理和乙二酰脲的形成机理进行了探讨。

The reaction mechanisms of ring cleavage and para - banic acid formation were discussed .

综述了近年来各种五元氮杂环的开环反应及其在有机合成中的应用。

Their ring opening reactions can be used for preparing polyfunctional or other cyclic compounds .

结合单晶数据分析，对环氧化反应、环氧环开环反应的机理和立体化学进行了深入探讨。

We have a thorough discussion of the epoxidation and ring opening reaction mechanism and stereochemistry .

探索了手性2,3-环氧醇的亲核开环反应，实现了经邻近基团参与的手性环氧醇的高区域和高立体选择性开环。

A highly regio-and stereoselective ring-opening of chiral 2,3-epoxy alcohol was furnished by neighboring group effect .

三甲基硅腈-碘化锌对β-蒎烯环氧化物的开环反应机理

Mechanistic Insights into the Opening of β - Pinene Epoxides with Trimethylsilyl Cyanide - zinc Iodide

手性催化的环氧化物立体选择性开环反应

Catalytic Enantioselective Ring Opening of Epoxides