This thesis mainly focuses on overcoming the substrates limition of the present catalytic systems,low catalytic efficiency,and application in total synthesis.1.Conveniently synthesized sulfonamide alcohol titanium complex has been used to catalyze the asymmetric addtition of methyl propiolate to various aromatic and aliphatic aldehydes with high enantioselectivity.

本論文即針對現有催化體系的底物局限性精品国模一区二区、催化效率低、應用研究少等展開研究：1、我們將簡便合成的磺酰胺基醇配體-鈦催化體系應用于催化丙炔酸甲酯對各類芳香醛及脂肪醛的不對稱加成取得了理想的結果。

The a-amino groups of amino acids react reversibly with aldehydes to form a variety of compounds, each of which is called a Schiff's base.

氨基的α氨基與醛反應是可逆的国产一级婬片A片免费无码百度，可形成多種化合物，每一種都叫希夫堿天天色色天天。

In the early 1920s, Franz Fischer and Hans Tropsch patented a process to produce a mixture of alcohols, aldehydes, fatty acids and hydrocarbons known as synthol, from a synthesis gas of hydrogen and carbon monoxide.

在1920年代初婷婷精品图区，弗菲舍爾和漢斯tropsch專利一個過程產生多種醇類，醛類脂肪酸和碳氫化合物稱為synthol 在线视频青青，從合成氣中的氫和一氧化碳日韩在线丝袜福利网站。

In the early 1920s, Franz Fischer and Hans Tropsch patented a process to produce a mixture of alcohols, aldehydes, fatty acids and hydrocarbons known as synthol, from a synthesis gas of hydrogen and carbon monoxide.

乙醛，和碳氫化合物組成的深夜人妻无码碰碰碰碰。F-T工藝是間接煤液化的基礎性爱视频喷水。因為通過蒸餾和氧氣的氣化作用，煤結構被完全分解成合成氣国产熟女对白免费播放，所以此工藝是間接的亚洲一区二区三区偷拍。然后這些氣體通過適當的F-T催化劑的作用日韩毛片中文字幕免费看，大部分形成蠟油狀的碳氫化合物在线一级手机视频，分子亮分布較寬。wjk678 發(fā)布在翻譯例文|發(fā)布時間： 12：20PM Apr 23日本3级黄色视频， 2008 |評論

A series of 3,3,6,6 tetramethyl 1,8 dioxo 9 aryl 1,2,3,4,5,6,7,8,9,10 decahydro acridines have been synthesized by the condensation of aromatic aldehydes, 5,5 dimethyl 1,3 cyclohexanedione and ammonium acetate in the presence of triethylbenzylammonium chloride as catalyst in water.

芳醛www.ahrwzdm.com、5 ，5 二甲基 199视频久久久久，3 環(huán)己二酮與醋酸銨在三乙基芐基氯化銨催化下以水作為溶劑反應天堂网在线WWW中文，生成一系列 3 ，3 日韩一级黄色录像影片夫妻性生活影片，6一级黄手机免费在线视频，6 四甲基 1，8 二氧代 9 芳基 1黄片免费在线播放，2 人干人人，3 ，4欧美AAAA在线视频免费观看，5 久热国产vs视频在线观看，6国产超污精品A级毛片，7，818禁网站在线免费，9加勒比综合网站，10 十氫吖啶，與其它溶劑相比欧洲一区无码精品色，水作為該反應的溶劑具有價格便宜欧美另类暴力丝袜，不易燃和無毒等優(yōu)點，而且產率較高肏逼视频毛片，產物的結構通過單晶X射線確

Biogenic amines are basic nitrogenous compounds formed mainly by decarboxylation of amino acids or by amination and transamination of aldehydes and ketones.

生物胺是一類含氮的脂肪族97国产男人的天堂在线视频、芳香族或雜環(huán)類低分子化合物，主要是通過氨基酸的脫羧或醛和酮的胺化和轉氨基作用形成的欧美色t。

Molybdophopsphoric Acid Catalysis in the Oxidative Cleavage of Olefins by the Hydrogen Peroxide Oxidative cleavage of the double bond could be catalyzed by H_3PMo_(12)O_(40) using H_2O_2 as oxidant, various trisubstituted olefins were oxidized to aldehydes or ketones in high yields. The system was not satisfied for electron-deficient olefins such as trans-(2-nitrovinyl) benzol or chalcone. The reaction of aliphatic olefins did not occur under the same conditions.

二久操B、磷鉬酸催化過氧化氫對烯烴的氧化斷裂反應用過氧化氫(30％)作為氧化劑，磷鉬酸可以催化氧化碳碳雙鍵的斷裂反應国产精品热久久无码AV，三取代的烯烴被氧化生成醛或酮国产JIZZ在线观看，產率較高；此體系對于缺電子烯烴如查爾酮色色视频看片，不飽和硝基化合物的斷裂反應效果較差人人操五月肥妇，脂肪族烯烴在此體系下的氧化并不發(fā)生。

Veratraldehyde conforms to the behavior of the monomethoxy aldehydes, yielding 6-chloroveratraldehyde.

Veratraldehyde遵從monomethoxy醛的行為生產 6-chloroveratraldehyde

Methods The method of methylation and microwave synthesis method of microwave radiation Veratryl aldehydes, synthesis of these two methods compare the yield of the product and the fundamental nature, analyzing the advantages and disadvantages of both methods.

采用甲基化的方法和微波微波輻射的方法合成藜蘆醛国产资源免费视频一区，比較這兩種方法合成產物的產率及基本性質亚洲精品视频在线免费，分析兩種方法的優(yōu)劣。

But like Esters, aldehydes may also be sedating.

但像酯亚洲无码操逼视频，醛也可瀉亚洲最新无码中文字幕久久。