reaction ring

Synthesis of β-Damascone(ⅰ)& Study on Catalytic Addition Reaction of β-Ring Citral

β突厥酮的合成-β环柠檬醛的催化加成反应研究

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Recent advances in ring closing metathesis ( RCM ) reaction, including olefin and enyne metathesis reaction are reviewed.

综述了近几年来关环复分解 ( RCM ) 反应的研究新进展, 包括了烯烃、烯-炔的RCM反应.

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In the picoline pyrolysis experiment, the methyl disengages from aromatic ring to form methane firstly, then the following reaction of the aromatic ring is similar to pyridine.

甲基吡啶的热稳定性比吡啶差，热解时甲基首先脱离芳香环进入气相，随后芳香环的反应途径和吡啶类似；

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The reactor with the compression-type structure is mainly composed by the base, the reaction cell plate, slide, rubber ring and screwing cap.

该反应器采用压装式结构，主要由基座、反应池板、玻片、橡胶圈和旋盖组成。

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

对开环反应机理和乙二酰脲的形成机理进行了探讨。

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The result shows that the transition state of the rearrangement reaction has a three-membered ring structure.

结果表明，该重排反应经过一个三元环过渡态。

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The key steps of hydrocracking of tetralin, the conversion of double ring compounds and the yields of mono-ring compounds were affected by the reaction temperature and the acidity of two catalysts.

四氢萘加氢裂化反应的关键步骤和双环化合物裂解的转化率以及单环化合物的产率与两种催化剂担体的酸性及反应温度有关。

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Medium pressure Metal ring ( M type) conduct the pressure into the pipe though the hole of path and groove to increase the reaction strength of metal ring.

中压型金属密封环（M型）将压力径侧孔或槽引入管内，以便加大密封环之反应力。

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Study of Nucleophilic Substitution Reaction of C-F Bond on a Benzene Ring under Activation of Hydrogen Bond PREPARATION OF CHITOSAN IMMOBILIZED WITH β-CD AT C_6 POSITION BY A NUCLEOPHILIC DISPLACEMENT REACTION

氢键活化的苯环上C-F键的亲核取代反应研究亲核取代法制备壳聚糖6-OH固载环糊精衍生物

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This paper presents a review on the intermolecular and intramolecular Diels-Alder cycloaddition reaction of the furan ring and their applications for organic synthesis.

本文就呋喃环参与的分子间和分子内D-A反应及其应用作一综述。

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Because it has shown a pleased result in many kinds of precipitation reaction such as ring precipitation reaction, agar diffusion reaction and so on.

结果：自制兔抗羊免疫血清和羊血清经环状沉淀、琼脂扩散多种沉淀反应试验，验证均与兔抗人血清和人血清的反应结果相近。

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Molecular rearrangement reaction was observed during the heat treatment and the formation of hexahydric imide ring was identified.

在发泡和后处理过程中分子链发生重排反应，生成六元酰亚胺环。

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HALOGENATION REACTION ON BENZENE RING Application and Synthesis of Sulfide Phenyl Trifluoromethyl

关于苯环上的卤代反应三氟甲基苯硫醚的制备和应用

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Study on the Mechanism and Reaction Kinetics of Ring Forming in the Grate-Rotary Kiln

链篦机&回转窑结圈机理及其反应动力学研究

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All above results show that the reaction experiences the six-member ring transition state with two-step path.

这表明该反应主要经历六元环过渡态的两步反应历程.

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On the basis of some industrial tests on DOP production line imported from BASF of Germany, and technological analysis in theory, a high effective regular packing was used in the reaction distillation tower instead of Pall ring packing.

在对国外引进装置进行工业试验，并从理论上进行技术分析基础上，应用高效规整填料塔技术对装置核心设备&酯化精馏塔进行了改造，同时对附属设备进行更换和完善。

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~ 1H-NMR and UV analysis show that, after reaction, benzene ring in the structure unit of the alkali lignin is steady, carboxyl, carbonyl and methoxyl all have reduced in different extent, while aliphatic and phenol hydroxyl have increased.

~1H-NMR和UV光谱分析显示反应后碱木质素的结构单元中苯环结构稳定，羰基、羧基、甲氧基有所减少，醇羟基和酚羟基的量增加了。

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Applications of thionyl chloride in pharmaceutical and pesticide sectors and application developments in organic synthesis reaction and ring formation reaction are introduced.

介绍了无机精细化工产品氯化亚砜在医药、农药等工业领域的应用及其在有机合成反应、成环（或闭环）反应中的应用开发现状；

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We synthesized this class of catalysts through construction of ferrocene monomer, coupling reaction, hydrolysis and ring closure, and relative configuration of catalysts were assigned by X-ray diffraction of ( S, Rp)-la.

我们通过二茂铁单体的构建、偶联、水解和关环反应高效地合成了该类催化剂，且最终产物（S，Rp）-1a通过X-ray单晶衍射确定了其相对构型。

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The further reaction between remaining broken ring cluster and strongly alkaline solution depends on the types of the remaining broken ring clusters and alkaline solutions.

偏高岭土溶解后的残环和碱溶液进一步反应与残环及碱溶液的种类有关。

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The treatise advances a new method to judge two kinds of fixed group of benzoic ring on electrophilic substitutive reaction in benzoic ring.

对苯环上的亲电取代反应提出一种判断苯环上两类定位基的新方法。

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Nucleophilic Substitution Reaction on the Porphyrin Ring: 2. The Solvent Effect in the Reaction of 2-NO_2-TPPCu(ⅱ) with Sodium Phenoxide

卟啉环上的亲核取代：2.溶剂对2-NO2-TPPCu（Ⅱ）与苯酚钠反应的影响

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The calculated results show that the aza Wittig reaction is a two step reaction, having one four membered ring intermediate on its reaction surface.

计算结果表明该反应是一个二步反应，在反应途径上存在一个四元环中间体。

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