英语人>网络例句>烯酮类 相关的搜索结果
网络例句

烯酮类

与 烯酮类 相关的网络例句 [注:此内容来源于网络,仅供参考]

Theoretical investigation of the solvent effects on the mechanism of the reaction of pentafulvenone with hydrocyanic acid to produce the main product of acid of type b was carried out at B3LYP/6-311+G(superscript **) level via the conductor-like polarizable continuum model.

在B3LYP/6-311+G计算水平上,采用导体极化连续模型研究了溶剂化效应对6-亚甲基环戊二烯酮与HCN反应生成主要产物b类酸的反应机理的影响。

2-Substituted-3,4-dihydro-1(2H)-isoquinolinones were synthesized from methyl 3-hydroxy-ben- zoates via allyl etherification, Claisen rearrangement, oxidation, reductive amination and aminolysis for the first time.

以3-羟基-4-甲氧基苯甲酸甲酯等为原料,通过烯丙基醚化、Claisen重排、氧化、与伯胺反应、还原、分子内酯的胺解六步反应合成了一系列2-取代-3,4-二氢-1-异喹啉酮类化合物。

The chapter two was focused on the samarium diiodide promoted organic reactions and their applications in organic synthesis, firstly, a new synthesis of highly substituted cyclopentadienes from a,β-alkynone promoted by samarium diiodide was investigated and the highly substituted cyclopentadienes were prepared in moderate to good yields under mild conditions. Secondly, the Michael addition and Michael-aldol tandem reaction of diorganyl diselenides or diorganyl disulfides with α,β-alkynones mediated by samarium diiodide were studied and a series of alkenylsulfides and alkenylselenides were prepared in good yields. Then the highly regioselecfive nucleophilic addition of the allylsamarium bromide to α,β-alkynones were explored. We found that the allylsamarium bromide reacts with α,β-alkynones to afford regiospecificly 1. 2-nucleophilic addition products in good yields under mild condition. At last we studied the coupling reaction of aryl halides promoted by NiCl〓/PPh〓/Sm〓.

第二章 研究了二碘化钐、金属钐促进的有机反应:1、二碘化钐促进下α,β-炔基酮的偶联环化反应,提供了一种制备多取代环戊二烯的新方法;2、二碘化钐促进下的二硫醚、二硒醚与α,β-炔基酮的Michael加成反应,为高产率地制备多取代的烯基硫或烯基硒化合物提供了方便可靠的新方法;3、二碘化钐促进下的二硫醚、二硒醚与α,β-炔基酮和醛、酮的Michael—aldol串联反应,提供了一种一锅法高产率地制备多取代的含硫的烯丙基醇或含硒的烯丙基醇类化合物的方便可靠的原子经济性的新方法;4、烯丙基溴化钐与α,β-炔基酮的高度区域选择性的1,2-亲核加成反应;5、NiCl〓/PPh〓/Sm〓促进的卤代芳烃的偶联反应-一种从各种卤代芳烃制备联苯类化合物的有效方法。

Objective: In order to provide sensitive and reliable technique for the study of the relationship between enviromental estrogens and diseases, analytical methods for three kinds of representative environmental estrogens such as mycotoxins (zearalenone and its metabolites, aflatoxin B_1 and ochratoxin A), persistent pesticide pollutants (hexachlorocyclohexane and dichlorodiphenyltrichloroethane) and industrial chemicals (bisphenol A and 4-nonylphenol) with chromatography were to develop.

目的:选择三种有代表性的环境雌激素:真菌类毒素(玉米赤霉烯酮及其代谢物及赭曲霉毒素A、黄曲霉毒素B_1)、农药类持久性污染物(666、DDT)和化工原料类雌激素为对象,分别研究它们的检测方法,为监控环境激素和研究它们与疾病之间关系提供灵敏、可靠的分析方法和实验依据。

In this study aldylencdithiomethylene Malonic acid acts as the main coordination agents and compound iron ion have been synthesized by the means of solution, As a result ,the 1D polymer is obtained.

本论文采用常规的溶液合成方法,首先设计合成了一个以含有二硫缩烯酮结构的丙二酸类配体和过渡金属铁离子的单核配合物,再以此单核配合物作为配体设计合成了三个异多核配合物和配位聚合物。

In this research, two novel compounds in which alkylenedithiomethylene Malonic acid act as the main coordination agents and the compounds containing N atom (such as pyridine, Phenanthroline Ethanediamine and 4,4'-Bipyridinyl) act as the associating coordination agents have been synthesized by the means of solution and solid-liquid diffusing reactions. 9 coordination complexes and polymers have been designed and synthesized in which the transition metals Cu and Zn acted as the centre ions. These compounds have been characterized by X-ray single crystal diffraction analysis, and some properties of them have been tested and analyzed.

本论文设计合成了两种结构新颖的含有二硫缩烯酮结构的丙二酸类化合物,以此为主要配体,以含氮化合物(吡啶、邻菲罗啉、乙二胺和4,4'-联吡啶)为辅助配体,采用常规溶液合成和固-液相扩散等方法,设计合成了9个过渡金属Cu和Zn离子配合物和配位聚合物,采用单晶X-射线衍射等技术对晶体结构表征,并对其部分性质进行了测试和分析。

Diamines are performed. An new and effective atom economy, domino reaction is developed, and 5, 6dihydro-4H-thieno [2, 3-b] thiopyran are synthesized by 4-(4-methyl-1, 3-dithiol-2-ylidene)-1, 7-diaryl-1, 6-diene-3, 5-dione

然后以4-[(4-甲基-1,3-二噻烷-2-亚甲基)-1,7-二芳基]-1,6-二烯-3,5-二酮类化合物为合成子探索稠杂环合成方法,并发现一个高效的,具有原子经济性的多米诺效应合成方法,并成功的利用其合成了一系列噻喃并噻吩衍生物。

Therefore, the research of synthetic method of flavonoids has the important value of scholarship and application.

因此,研究异戊烯基黄酮类化合物的合成方法具有重要的学术和应用价值。

Quinocetone and Cyadox, which were new growth promoters ofthe quinoxalines family, had the characteristic of low toxicity, less side effect and obviousgrowth promotion in food-producing animals.

喹烯酮和喹赛多是新一代喹喔啉类抗菌促生长剂,毒性低,毒副作用小,对食品动物具有良好的促生长效果,具有广阔的应用前景。

Employing CuI(5 mol%), N,N-dimethylglycine hydrochloride(10 mol%) and K_2CO_3(2 equiv.) in refluxing THF as the optimized reaction conditions,the four-membered 4-alkylidene-2-azatidinones could be efficiently synthesized.

当以3-溴-3-N-苯基-丁烯酰胺为底物,在5 mol%CuI为催化剂,10 mol%N,N-二甲基甘氨酸盐酸盐为配体,2当量K_2CO_3作碱,THF回流的反应条件下,可以高效的合成2-亚甲基-4-氮杂环丁酮类化合物。

第5/7页 首页 < 1 2 3 4 5 6 7 > 尾页
推荐网络例句

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力