这表明重排反应是立体专一性的。
This indicates that the rearrangement reaction is stereospecific.
本文综述了烷氧基重排反应。
结果表明,该重排反应经过一个三元环过渡态。
The result shows that the transition state of the rearrangement reaction has a three-membered ring structure.
方法热重排反应。
结果发现,该重排反应经过一个面外三元环过渡态。
The result shows that the transition state of the rearrangement reaction is a three-member ring structure external the molecular plane.
肟重排反应生成己内酰胺的机理及反应动力学方程。
Beckmann rearrangement reaction is that amide is formed by ketoxime under the condition of acid catalyzer.
对精细有机合成反应中常见的一些分子重排反应,进行分析归纳。
On common molecular rearrangement reactions in fine organic synthesis reaction. Made analyses and induce to them.
而且利用这个重排反应为光学纯度叔亮氨酸的制备提供新的方法。
Moreover, this rearrangement reaction provided a new way of preparing enantiomerically pure tert-Leucine.
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。
Molecular rearrangement reaction was observed during the heat treatment and the formation of hexahydric imide ring was identified.
弱配位场作用下,配体不合理的堆积将导致配体的交换重排反应。
Under weak ligand field interaction, various types of improper packing of ligands will induce lig and exchange and rearrangement.
重排反应时避免直接使用危险性大的过氧酸,本合成工艺安全可行。
This synthetic method is safer and easily operated due to the avoidance of direct use of hazardous peracid in the rearrangement.
报道了由苯酚经过乙酰化、肟化、重排反应合成扑热息痛的一种新方法。
This paper reports a new process of synthesizing paracetamol from phenol by acetylization, oximation and Beckmann rearrangement.
本文主要阐述了重排反应在医药、农药、天然产物、染料等合成中的应用。
Applications of rearrangement reactions in the pharmaceutics, pesticides, natural products and dyes were reviewed in this paper.
以淀粉为原料使之与聚丙烯酰胺经霍夫曼重排反应产物进行接技反应而制得。
Starch as a raw material is grafted on a reaction product which is made by Hofmann rearrangement of polyacrylamide.
最后研究了4位芳香基取代1H-2,3-苯并恶嗪结构化合物的重排反应。
The rearrangement of 4-aryl 1H-2,3-benzoxazine derivatives was investigated.
本合成工作的关键为9,15环丙基的形成及在重建GA骨架时a环中双键的重排反应。
The key reactions included the formation of 9, 15-cyclopropyl function and double bond migration in the a ring to reestablish the GA skeleton.
由于贝克曼重排反应的机理非常复杂,而且该反应速率极快,因此对其机理的认识很不一致。
Because the kinetics of Beckmannrearrangement is very complicated and the reaction speed is very fast, the realization of its reaction kinetics is very variant.
异丁醇气体和空气混合后通过催化剂层的固定床反应器,使氧化反应和分子重排反应同时进行。
The oxidation and molecular recomposition proceeded in the same time, when the isobutanol gas and air passed the fixed bed catalytic reactor continuously.
环己烯基-2-烯丙基锌经金属-克兰荪重排反应,生成2-烯丙基-1,1-偕二金属环己烷。
Allyl - cyclohexenyl zinc undergoes the metalla - Claisen rearrangement leading to 2 - allyl 1, 1 -Gemdimetallic - cyclohexane.
从配体空间堆积效应分析了配体混合重排反应、金属—配体非整数比化学组成、奇偶效应等现象。
The ligand mixing reaction, the nonintegral metal- ligand ratio in compound compositions, the even-odd effect and related phenomena are analysed in the light of the steric packing of the ligands.
第三章:在微反应器中研究出了一种高效绿色的对位取代的苯基烯丙基醚的克莱森重排反应的方法。
Chapter 3: a new green synthetic platform in a microreactor system to synthesize allyl para-substituted phenyl phenols via Claisen rearrangement in high efficiency has been developed.
根据传统过渡态理论、变分过渡态理论及相应的隧道效应校正,计算了本重排反应的反应速率常数。
The reaction rate constants have been calculated according to conventional transition state theory, variational transition state theory and tunneling corrections respectively.
本文研究了磺酸化的聚苯乙烯树脂在酯化、酯交换、缩醛或缩酮的合成、醚的合成及(口片)呐重排反应中的应用。
This paper reports the study on the sulfonated polystyrene resin used in esterification, transesterification, synthesis of acetals or ketals, synthesis of ether and rearrangement reaction of pinacol.
其结果证实:在种种分子重排反应中,总是趋向于生成结构更稳定的碳正离子或碳负离子或自由基中间体及其产物。
Their result affirm: in all sorts of molecular rearrangement reactions, anyway tend to produce more stable carbocation, or carboanion, or free radical middle substance and their products.
本文建立了己内酰胺液相重排反应转位酯中环己酮肟含量的测定方法,为环己酮肟液相重排反应动力学的研究奠定了基础。
Method of determination of cyclohexanone oxime concentration in esters gained in liquid phase Beckmann rearrangement is set up in the paper, which is a basis of the above reaction kinetics.
讨论了Hofmann重排反应的机理以及烃基的结构、介质中的亲核试剂对反应的影响,并介绍了此重排在有机合成中的应用。
The mechanism of Hofmann rearrangement reaction and the effects of alkyl structure and nucleophilic reagent in medium on the reaction are discussed.
评述了阳离子型聚合中电子重排、基团迁移异构化聚合反应和机理。
In this paper, the electron rearrangement, group transfer isomerization reactions and mechanism in carbocationic isomerization polymerizations are reviewed in detail.
反应混合物可以进一步酯化重排制备维生素A的中间体1-氯-2-甲基-4-乙酰氧基-2-丁烯。
The reaction mixture then undergo esterification and rearrangement reaction to prepare 1-chloro-2-methyl-4-(acetyloxy)-2-butene, which is a important intermediate of vitamin A.
反应混合物可以进一步酯化重排制备维生素A的中间体1-氯-2-甲基-4-乙酰氧基-2-丁烯。
The reaction mixture then undergo esterification and rearrangement reaction to prepare 1-chloro-2-methyl-4-(acetyloxy)-2-butene, which is a important intermediate of vitamin A.
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