烯胺是一类重要的反应中间体,其在有机合成中有着广泛的应用。
The enamine is a type of important reaction intermediate, it has an extensive application in organically synthesize.
用GH沉淀剂回收钨酸催化剂,同时将反应中间体进一步转化成戊二醛。
The tungstic acid catalyst was recovered by GH deposition agent, and in the meantime the intermediate product was converted to pentanedial.
环氧环己烷是一类非常重要的化学反应中间体,在有机合成领域中有着重要的学术价值。
Cyclohexene oxide, one of the most important organic intermediates, has attracted great academic interest in the field of organic synthesis.
正碳离子是有机化学反应过程中一种活泼的反应中间体,对于它的研究已经有100多年的历史。
Carbenium ion is an active intermediate state in organic reactions, which has been investigated for over 100 years.
醇类化合物尤其是仲醇类化合物是重要的反应中间体,在工业生产、药物生产以及日常生活中都有重要用途。
As an important intermediate of chemical reaction, alcohol, especially secondary alcohol, plays an important in industrial production, medicine synthesis and daily living.
介绍了利用金属离子的配位作用捕获并分离重要有机反应中间体—— 自由基中间体的研究方法和最新进展。
Methods and recent development of isolation of structurally characterizable alkali, alkaline earth and lanthanide metal ketyl radical complexes were reviewed in the paper.
芳基叠氮化合物因其易于制备、黑暗中稳定、光照下产生高活性反应中间体等优点而被广泛应用于光亲合标记研究中。
Aryl azides are by far the most frequently used photoaffinity probes because they can be easily synthesized, as well as being chemically stable in the dark and highly reactive upon photoirradiation.
这是一种非常容易反应的中间体。
应用此方法,一组含有两个中间体的自催化反应的模拟数据得到了成功的解析。
By using this method, a synthetic data matrix for an autocatalytic reaction with two intermediates has been successfully resolved.
一种是通过生成环状正离子中间体进行的,通过这样的历程进行的加成反应是反式加成。
One is conducted amidst formed cyclic cation intermediate and the reaction thus carried out is known as anti- form addition.
它可以代替剧毒的光气和硫酸二甲酯作为环境友好的有机合成中间体和起始物质,应用与羰基化和甲基化反应中。
It can be use as an environment-friendly intermediate and starting material for organic synthesis substituting the poisonous phosgene and dimethyl sulfate in carbonylation and methylation reaction.
用硫酸乙酐混合物作环合剂,制备了氟嗪酸中间体.该方法具有反应条件温和、价格便宜、后处理简单的优点,适用于工业化生产。
Sulfuric acid and acetic anhydride were used as a cyclizing agent to prepare Ofloxacin intermediate. The reaction could be carried out under moderate conditions and facilitate industrial produce.
讨论由飞秒激光脉冲所构成的飞秒化学,及其对化学反应过渡状态或中间体的研究和检测。
This article discusses the femto-chemistry, because it involves femtosecond laser pulses, and its research or monitor into chemical processes of transition state and intermediate.
反应温度和底物浓度对中间体的形成和消失有较大的影响。
The formation and disappearance of intermediates are largely affected by the reaction temperature and substrate concentrations.
活性中间体越稳定,其越容易形成,反应活性就越大。
The more stable an activated intermediate is, the easier the formation is, and the more active the reaction is.
不同反应时间样品的IR和XRD谱图分析表明,富铁铁酸钴是通过中间体绿锈形成的。
The samples obtained at different intervals during reaction were characterized by XRD and IR. The cobalt-bearing ferrites were produced through the green-rust intermediate phase.
减压渣油重胶质的热反应生焦特点是:初次反应的较低分子质量的产物中,高芳碳率的产物结合形成中间体产物,然后进一步缩合成焦炭。
The characteristics of the coke produced of the heavy resin thermal reaction is that high aromaticity products form intermediate products and then condense to coke in low molecular weight products.
以苯并噻唑为原料,通过工艺研究,合成了生产化学除草剂苯噻草胺的中间体2 -氯代苯并噻唑,分析实验结果表明,反应收率高,产物纯度高。
The synthesis of 2_Chlorobenzolthiazole, which can be used as intermediate in the manufacture of herbicide named as Mefenacet with high yield and purity, was reported in this paper.
反应机理推测为丝、苏氨酸的侧链基团羟基在咪唑的存在下亲核进攻磷原子形成五配位中间体。
Only N-phosphoryl serine and threonine methyl esters were catalyzed by imidazole, A new type of pentacoordinate phosphorus intermediate was proposed.
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.
第二步,在金属钾催化条件下,使第一步产物缩水甘油醚发生开环加成反应生成双子表面活性剂的中间体低聚二醇。
The second step, the digomeric glycol-intermediate product of Gemini. surfactant was prepared by opening ring reaction of glycide ether in the presence of potassium as catalyst.
碳烯和硅烯是分属于碳化物和硅化物中的两类反应活性中间体。两者甚为相似。
Carbene and silylene are two kinds of reactive activity intermediates which belong to carbide and silicide separately, but they are quite similar.
在乙腈溶剂中,碳酸钾存在下,双咪唑啉和1,2-二溴乙烷进行扩环反应,得到环状中间体一溴盐,产率78。
The reaction of bis-imidazoline with 1,2-dibromoethane and potassium carbonate in acetonitrile provided monobromide salt with a yield of 78.
在DMF-四乙基溴化铵(TEAB)质子惰性介质中,马蔺子素连续两步单电子还原生成相应氢醌阴离子,无中间体半醌自由基的化学反应发生。
In DMF tetraethyl ammonium bromide(TEAB) media, the reduction of irisquinone was two successive single electron processes without the chemical reaction of the free radical semiquinone.
间歇反应过程在精细化工、催化剂制备、染料中间体等行业应用广泛。
The batch process has been widely applied in many industries such as the fine chemical industry, the catalyst preparation and the dye intermediates preparation, etc.
同时,用钯催化“一锅法”反应以较高的收率合成了关键中间体2-乙酰基茚衍生物。
The key inter- mediate 2-acetylindene compounds were synthesized by one-pot palladium-catalyzed reaction in goody.
此一系列反应条件较温和,产率较高,中间体和产物纯化处理较容易。
The above mentioned reactions could take place under mild conditions, the yields were high, and the products were purified easily.
本文以三个例子,分别介绍了用量子化学方法求得有机反应的中间体、过渡态和反应途径的方法。
Three examples are cited for illustration of theoretical methods used by the present authors for calculating the intermediate, transition state and reaction path of organic reaction.
本文以三个例子,分别介绍了用量子化学方法求得有机反应的中间体、过渡态和反应途径的方法。
Three examples are cited for illustration of theoretical methods used by the present authors for calculating the intermediate, transition state and reaction path of organic reaction.
应用推荐