查询词典 aldehyde collidine

Synthetic progresses of the sorbitol acetals in process routes, the molar ratios of aldehyde to sorbitol, the reaction temperature, the types and the amount of acid catalysts, the types of acromatic aldehyde, reaction solvents and purification methods of products were reviewed at domestic and aboard with 46 references.

讨论了缩醛反应机理。从反应工艺路线、反应物醛与醇物质的量比、反应温度、酸催化剂的种类和用量、芳香醛的种类、反应溶剂及产物的纯化方法等方面全面综述了国内外山梨醇缩醛类成核剂合成研究进展。

The present invention belongs to technology field for preparing aldehyde or ketone by oxidizing alcohol, particularly which is microwave-promoted method for preparing aldehyde or ketone by alcohol liquid-phase selective catalytic oxidation.

本发明属于醇氧化制取醛、酮技术领域，具体为一种微波促进的醇液相选择氧化制备醛或酮的方法。

As far as these organic matters are concerned, there are as much sixteen kinds of low molecular weight organic acids and Aldehyde, Alcohol, Ketone, Carboxylic acid, Carboxylic acid, Furan, Pyrazine, Fat hydrocarbon, sulphide and so on. The results have also shown that the content of Aldehyde, Alcohol, Fat hydrocarbon, Carboxylic acid, Furan, Pyrazine, sulphide in composted production amended with NMF inoculants increased 6.5%、9.2%、5.7%、15.6%、9.8%、11.3% and 28.6%, respectively.

研究证实添加微生物腐熟菌剂的奶牛粪堆肥产品中醛类、醇类、酯类、羧酸类、呋喃类、吡啶类和含硫类等低分子有机化合物的相对含量比未添加NMF微生物腐熟菌剂分别增加6.5%、9.2%、5.7%、15.6%、9.8%、11.3%和28.6%，而酮类、脂肪族碳氢化合物的相对含量则分别减少11.4%和15.5%。

Results:Methyl aldehyde can"t preserves efficiently the ultrastructure of the renal biopsies.Osmium tetroxide can preserves efficiently it but affects dyeing of the section for light microscopy.However,glutraldehyde not only preserves it better than methyl aldehyde but also doesn"t affect dyeing of the section for light microscopy.

结果：甲醛固定不能有效保存肾穿组织的超微结构，锇酸的固定能有效地保存超微结构，但严重影响了光镜切片的染色；而戊二醛与甲醛相比，较好地保存了肾穿组织的超微结构，同时又不影响光镜切片的染色。

They are 2,7-dihydroxy-1,5,6-trimethoxy-9,10-phenanthrene,p-hydroxy phenyl aldehyde, 4-Hydroxybenzyl alcohol, Protocatechuic aldehyde, Gastrodin, 4,4'-Dihydroxydiphenylmethane,4-(4-(hydroxym-ethyl)phenoxymethylphenol,Isorhamnetin-3-O-glucoside,Isorhamnetin-3,7-di-O–glucoside, Imbricatin,2,3-dihydroxy-7-methoxy-9,10-dihydrophenanthropyrone, Cyclopholidone,Cyclopholidonol and β-daucosterol.

分别为：2，7-二羟基-1，5，6-三甲氧基-9，10-二氢菲，对羟基苯甲醛、天麻苷元、原儿茶醛、天麻素、4-（4-羟基-苄基）苯酚、4(4-苯氧基甲基苯酚、异鼠李素-3-O-葡萄糖苷、异鼠李素-3-O-7-O-二葡萄糖苷、Imbricatin、2，7-二羟基-3-甲氧基-9，10-二氢菲吡喃酮、Cyclopholidone、Cyclopholidonol和β-胡萝卜苷。

Firstly, phenyliodine diacetate was immobilized to the 2% cross-linked polystyrene or the liner polystyrene resin. The more iodine the resin had, the lower conversion to phenyliodine diacetate. We made our endeavor to extend the range of useful application of polystyrene supported phenyliodine diacetate in organic synthesis:(1) the reagent was used as an effective reagent of carbonyl regeneration from oximes and semicarbazones of ketones.(2) the reagent was also applied to the synthesis of 1, 3, 4-oxadiazoles, 1, 3-disubstituted-2-pyrazoline, 2-arylbenzoxazole from aldehyde N-acylhydrazones, aldehyde hydoazones and phenolic Schiff's bases respectively.

首先，我们以2％交联的聚苯乙烯和线性的聚苯乙烯树脂为载体，制备了聚合物负载的二醋酸碘苯，通过研究发现：(1)聚苯乙烯二醋酸碘苯是酮肟、缩氨脲有效的去保护试剂，不仅芳香酮，脂肪酮和α，β不饱和酮的肟、缩氨脲也能顺利转化为相应的酮，实现酮基的再生；(2)我们还利用此试剂，分别与醛的N-酰基苯、N-酰基苯腙及邻羟基芳亚胺反应，在温和的条件下发生成环反应，以良好的产率生成1，3，4-噁二唑、吡唑啉和二取代苯并噁唑等杂环化合物；(3)聚苯乙烯二醋酸碘苯还可有效地将邻羟基芳酮的酰腙经氧化、重排成1，2-二酰基苯。

Acetaldehyde generated from the 2 - butene aldehyde carbonyl and the reaction is the condensation of methylene ...

由乙醛生成2－丁烯醛的反应是羰基与亚甲基发生缩合的。。。

Formaldehyde, acetaldehyde and acrolein are common aldehyde in the environment.

甲醛、乙醛和丙烯醛均为环境中常见的醛类。

The reaction process in methanol solvent can be deduced from the computational results with CPCM solvent model and the supermolecular handling, namely the reaction involves four steps in the methanol solvent. The nucleophilic addition of trimethylamine to acraldehyde generates an enolate. Nucleophilic attack of the enolate on the aldehyde forms the carbon-carbon bond, followed by the proton-transfer process and the further elimination generating the product and liberating the trimethylamine catalyst.

对于CH3OH对反应体系的影响，可以综合考虑CPCM溶剂模型及超分子模型下的研究结果，即CH3OH溶剂中反应按四步进行，催化剂三甲胺首先与丙烯醛发生亲核加成，生成的两性离子中间体与甲醛发生类似于Aldol的醛醇缩合，形成碳-碳键，之后发生分子内质子转移，最后经E1cb消除得到产物，并释放催化剂三甲胺。

This method handy, fast, accurate, reappearance is good, the aldehyde in suiting all sorts of water and acrolein while determine

该方法简便、快速、准确、重现性好，适合各种水中乙醛和丙烯醛的同时测定

You can buy sweetened beverages, if that suits you.

你若喜欢的话，可以买些含有糖精的混合饮料。

As many of you are probably aware, Nick and Vanessa were recently faced with an embarrasing sex scandal after naked pictures of the two getting jiggy with it in a hot tub surfaced the net.

正如很多你可能知道，尼克和 Vanessa 最近面临一个尴尬的绯闻事件后，赤裸裸的图片两个越来越jiggy与它在浴缸中的一个热点浮现净。