英语人>网络例句>芳醇 相关的搜索结果
网络例句

芳醇

与 芳醇 相关的网络例句 [注:此内容来源于网络,仅供参考]

A series of methyl 2,7,7-trimethyl-5-oxo-4-aryl1,4,5,6,7,8- hexahydroquinoline -3-carboxylate were synthesized by the reaction of aromatic aldehydes,dimedone and methyl acetoacetate using ammonium acetate as catalyst in glycol under microwave irradiation with 82%~98% yields in 4~6 min.

微波辐射下以芳醛、达咪酮、乙酰乙酸甲酯为原料,乙二醇为溶剂,醋酸铵为催化剂合成了一系列2,7,7-三甲基-5-氧代-4-芳基-1,4,5,6,7,8-六氢喹啉-3-羧酸甲酯化合物,反应时间4~6 min,产率82%~98%。

The invention provides a method for homopolymerizing conjugated dialkene or co-polymerizing conjugated dialkene and monovinyl aromatic hydrocarbon. The method comprises the following steps: the conjugated dialkene is homopolymerized or the conjugated dialkene and the monvinyl aromatic hydrocarbon are co-polymerized randomly. The method is characterized in that at least one alkali metal alkoxide compound expressed by the formula is used as a structure regulator; in the formula, R is linear chain or branched chain alkylidene radical having 1 to 10 carbon atoms; M is alkali metal selected from Li, Na, K, Rb and Cs.

本发明提供了一种使共轭二烯烃均聚或者使共轭二烯烃与单乙烯基芳烃共聚的方法,包括在阴离子聚合条件下使共轭二烯烃进行均聚或者使共轭二烯烃与单乙烯基芳烃进行无规共聚,其特征在于采用至少一种式所示的碱金属醇盐化合物作为结构调节剂,其中R为具有1-10碳原子的直链或支链亚烷基;以及M为选自Li、Na、K、Rb和Cs的碱金属。

In this thesis, investigations focused on heteropoly acids-catalyzed C-C and C-N bond formation reactions and the synthesis of xanthenediones and acridinediones under thermal conditions are described.1.12-Phosphotungstic acid has been used as an efficient,eco-friendly,and air- and moisture-stable catalyst to promote the direct dehydrative substitution of the hydroxy group of benzylic and allylic alcohols with variousβ-dicarbonyl compounds.

本篇论文主要描述了杂多酸催化下的C-C和C-N键的生成,以及无溶剂直接加热下合成十氢氧杂蒽二酮和9-芳基十氢吖啶二酮。主要内容如下:1。在磷钨酸催化下,1,3-二羰基化合物与醇能够顺利偶合,脱除一分子的水,生成烷基化的1,3-二羰基化合物。反应在甲苯中进行时,二芳基甲醇能与各类1,3-二羰基化合物反应,成率很高;但对于1-苯乙醇,只能得到很低的产率。

Result showed that tetrasubstituted calix [4] arenes in lower rim were stronger complex abilities than bisubstituted calix [4] arene with transition metal, heavy metal and rare earth ions. But when introducing the aminephenolicalcohols in the 1, 3-bisubstituted calix [4] arenes, the complex abilities were improved.

结果表明:在Lower rim上四取代的杯[4]芳烃配体比1,3-二取代的杯[4]芳烃配体对过渡金属离子,重金属离子及稀土离子有更好的配位能力,但当1,3-二取代的取代基上引入醇胺链型配体时,对金属离子也有很好的配位能力。

The key techniques of this project are as followes: By means of optimum seeking of pure Cinnamomum camphora var.

本项目核心技术:通过优选含芳樟醇高达95%的纯种芳樟,再经植物克隆技术培育成种苗,种植后不变异;有效物含量高;杂质少;不经蒸馏分离工序,即可达到合格产品。

Chapter 3: Synthesis of 2-aroyl-l,3,5-triaryl-4-carbethoxy-4-cyanocyclohexanols from chalcones with ethyl cyanoacetate is carried out in excellent yields with KF/basic alumina as catalyst under ultrasound irradiation.

第三章:研究了超声辐射下,以碱性氧化铝固载氟化钾为催化剂,利用查耳酮和氰乙酸乙酯合成2-芳酰基-1,3,5-三芳基-4-乙酯基-4-氰基环己醇。

The results show that calix[6] arene-bismetalloporphyrins possess much higher catalytic activity than the corresponding metalloporphyrin while displaying the sam eselectivity by giving rise to acetophenone as the ketonic component in excellent yield.

研究了杯[6]芳烃-双金属卟啉在氧化异丙苯中的催化行为,结果表明杯[6]芳烃-双金属卟啉比之相应的金属卟啉具有更高的催化活性,并表现同样的选择性,生成苯乙酮和醇组份。

The present doctoral dissertation was carried out to study the chemical constituents isolated from stems of two medicinal schisandraceous plants.34 compounds were isolated from the ethanol extracts of the stems S.henryi collected in the Jiangxi province by various column chromatographies.27 of them were identified on the basis of spectral analysis.There are 18 lignans,(including 5 dibenzocyclooctadienes,6 aryltetralins,2 tetrahydrofurans,3 diarylbutanes,2 other lignans),3 flavanols,2 glyceroesters,1 naphthoquinone,1 xanthine and 2 steroids,of which 6 compounds were new compounds,and 7 compounds were isolated from this family for the first time.

采用多种色谱技术进行分离纯化,从翼梗五味子藤茎的乙醇提取物中分离到34个化合物,综合运用现代波谱学技术鉴定了27个化合物,包括木脂素类化合物18个(其中联苯环辛烯类木脂素5个,芳基四氢萘类木脂素6个,四氢呋喃类木脂素2个,二芳基丁烷类3个,其他类型木脂素2个),黄烷醇类化合物3个,甘油酯类化合物2个,萘醌类化合物1个,黄嘌呤类化合物1个,甾体类化合物2个,其中,5个为新化合物,7个为本科首次报道。

Autocorrelation topological study on the acute toxicities of substituted aromatic compound s;2. The autocorrelation topological researches on slow and acutetoxicities of substituted aromatic compound s to scenedesmus ubliquus, rat and so on;3. Results show that the SW and KOW of the substituted aromatic compound s could be better forecasted at AM1 level.

应用分子力学方法MM+和半经验量子化学AM1、MNDO和PM3法得到了54种取代芳烃的优势构象,在此基础上结合分子图形学技术,获得相应优化构象的电子结构参数和几何结构参数,并将这些参数与取代芳烃的辛醇/水分配系数和溶解度相关联。

Less preferred metal chelating groups are hydroxides amines which may be aliphatic aryl or heteroaryl; or mercaptans which may be aliphatic aryl or heteroaryl.

次选项金属螯合组的氢氧化物胺可能是脂肪族,芳基或杂;或硫醇可能是脂肪族,芳基或杂。

第6/13页 首页 < ... 2 3 4 5 6 7 8 9 10 ... > 尾页
推荐网络例句

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称;三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起,称之为挽歌体诗人或者史诗诗人,他们被称为诗人,似乎只是因为遵守格律写作,而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。

This is not paper type of business,it's people business,with such huge money involved.

这不是纸上谈兵式的交易,这是人与人的业务,而且涉及金额巨大。