The synthesis of chiral pharmaceuticals is a hot issue of the development in pharmaceutical in the world,asymmetric hydrogenization of which is the successful technology in the chiral synthesis .

手性藥物的合成是目前全球藥物開發(fā)研究的熱點www.888午夜，而不對稱氫化是手性合成中最成熟的技術(shù)国产模特视频一区一页。討論了不對稱氫化技術(shù)在鎮(zhèn)痛類久久免费观看视频www、抗生素類、抗菌類人人人干人人人操、抗憂郁類以及維生素類等9類手性藥物合成中的實際應用

Process condition study of synthesis of starch of hydroxamic acid type;2. By study of hydroxamic acid synthesis and red mud settling behavior,its high clarified degree was described.

氧肟酸型絮凝劑是近年來國外研制出的一種新型高效絮凝劑www.caopor.com，在鋁土礦制備氧化鋁生產(chǎn)中對赤泥顆粒有很強的聚合力。

Comparing with the traditional way of stronger sulfuric acid ,The catalyst has its advantage of more effective on the synthesis,the operation is more safer, does not corrode the equipments and does not pollute the environment,and the recovering operation is simple. So it can be called a green method on synthesis of isobutyl acetate.

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One zeolite capsule catalyst with a new core (Co/Al2O3)/shell(H-beta membrane) structure was prepared and utilized for the middle isoparaffin direct synthesis via Fischer-Tropsch synthesis reaction.

制備了一種具有Core (Co/Al2O3)/Shell結(jié)構(gòu)的沸石膠囊催化劑，并用來在費托合成反應中進行異構(gòu)烷烴的合成性爱av一区二区三区。

Acidic ion-acidic resin can also be used as a catalyst for organic synthesis, it's used instead of concentrated sulfuric acid can be catalyzed synthesis of dihydro-coumarin compounds [1], High purity isopropenyl acetate [2] and other organic compounds.

酸性離子酸性樹脂也可作為一種有機合成催化劑精品国产亚洲污黄网站在线观看，用它替代濃硫酸可催化合成二氫香豆素類化合物[1]，乙酸異丙烯酯[2]等有機化合物久久久久精品国产三级。

In this paper,several synthesis methods of isothiocyanates were summarized as well as its application in synthesis of compound and biotechnology.

異硫氰酸酯作為一類重要的有機合成中間體国内精品午夜理论，其制備及應用受到廣泛關(guān)注。

The former is necessary for equilibrium-controlled synthesis of peptide bonds while the latter is necessary for kinetically controlled synthesis of peptide bonds.

酰胺酶活性起水解或合成肽鍵的作用亚州日韩制服丝袜图片，因而對平衡控制的肽鍵合成是必需的毛片激情片免费看；酯酶活性起轉(zhuǎn)移酰基的作用国产亚洲无线一区二区，因而對動力學控制的肽鍵合成是必需的亚洲激情第二页。

Series recording, cartoon voice-over Set works Advertising categories: Jiaoen Jun speak of the "Li Wang Men Italian" music He Jiong speak of "the speed of light sport shoes" music Jiemin speak of the "Kang riding sports shoes," music "Lili potato chips" advertising music China's famous performing artists Zhibing speak of the "Prestige Bird" men's music system Such as Cartoon categories: the "ship-culture" music "JACKIE kilometers klippe" sound recording and music production "Wohu queue" music "Ancient adventure" music Game categories: online games "sea of movement," complete music, sound effects Online games "street football" music video Online games "Anchao" full audio production Drama series category:"emblem mother WAN heart" Taiwanese version of sound recording and Synthesis "Spring stepmother heart" Taiwanese version of sound recording and Synthesis Enterprise songs of the Astra Astra of Xiamen International Arts Limited, the corporate song "ARTREE" Part QU Xiamen gifted Thai Health Technology Limited, enterprises song,"You Thailand" Arranged 2006 cross-strait Tanabata hand large-scale activities theme song "Tanabata love" Arranged

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The dissertation mainly consists of two parts:1. The Reaction Chemistry of Alkynes under Palladium Catalysis Part 1 studies the reaction α,β-unsaturated carbonyl compounds with alkenylpalladium intermediate generated by nucleopalladation, and discovered 1 the Pd-catalyzed tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls,2 the four-component tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls, 3 the tandem intramolecular oxypalladation-conjugate additionreaction of alkynoic acids with α,β-enals. These new reactions provide notonly efficient highly stereoselective methods for the synthesis of γ,δ-unsaturated,polyunsaturated carbonyl compounds and γ-lactonic aldehydes, but also thebasic transformations for a number of C-C bond formation reactions which can be usedto design synthesis of many acyclic, cyclic or polycyclic compounds.

本論文的主要工作分為兩個部分：一、鈀催化下炔烴的反應化學在本小組前人工作的基礎上www.黄色av.com，我們詳細研究了炔烴親核鈀化產(chǎn)生的烯基鈀中間體與α免费在线不卡av，β-不飽和羰基化合物的反應，發(fā)現(xiàn)兩價鈀催化下鹵離子-炔烴-α97干视频，β-不飽和醛酮的串聯(lián)加成反應欧美一级俄罗斯a片、鹵離子-炔烴-α中文字字幕在线播放，β-不飽和醛酮的西組分串聯(lián)加成及炔酸分子內(nèi)氧鈀化-串聯(lián)Michael型加成反應欧美色图亚洲；由此發(fā)展了γ，δ-不飽和醛酮国产熟女精品视频500、多不飽和羰基化合物和帶有醛酮基側(cè)鏈的γ-丁內(nèi)酯衍生物的高立體選擇性合成方法久久精品黄大片，這一過量鹵離子存在下的烯基鈀對α，β-不飽和羰基化合物共軛加成反應的發(fā)現(xiàn)影音先锋AV资源网日韩在，為大量碳-碳鍵形成反應的實現(xiàn)提供了基礎持黄持好看视频免费，使我們能夠從這一基本反應出發(fā)，設計和開發(fā)多種分子內(nèi)高清国产黄片、分子間的碳碳成鍵反應黄页观看在线免费，以好的立體91第四色国产在线视频、區(qū)域選擇性組建開鏈、環(huán)狀及多環(huán)類型的化合物www1黄色视频免费。

Synthesis and chracterization of high ordered Ladderlike Polysilsesquioxane Since Brown first reported the synthesis of ladderlike polyphenylsilsesquioxane via "thermal equilibration polymerization"in 1960, it is still a question whether ordered ladderlike polysilsesquioxane can be prepared or not all over the world till now.

第一部分高規(guī)整性梯型聚硅氧烷的合成1960 年Brown 首次報道了用&熱平衡縮聚法&合成含梯形結(jié)構(gòu)的聚苯基倍半硅氧烷亚洲无码乱伦精品，但該報道受到許多研究者的質(zhì)疑。至今40 多年來對能否合成真正規(guī)整梯形結(jié)構(gòu)的聚倍半硅氧烷一直存在著爭議激情久久小说。