查询词典 aldehydes

Yoo and Li communicated the successful oxidative amidation of aldehydes with amine hydrochloride salts and Cu/Ag catalysts J.

柳、李沟通成功的醛胺氧化酰胺盐酸盐、铜/银催化剂 J时。

The Knoevenagel condensation reactions between aromatic and α,β-unsaturated aromatic aldehydes with barbituric acid can effectively be performed in ionic liquid without additional acid or base catalyst, it is a simple efficient method for the synthesis of benzylidene barbituric acids, which have been widely used in pharmaceutical chemistry as well as in organic synthesis.

芳醛、α，β-不饱和芳醛和巴比妥酸间的Knoevenagel缩合反应能在离子液体中没有酸碱催化剂的条件下顺利进行，是合成在药物化学和有机合成中有广泛用途的苯亚甲基巴比妥酸类化合物的简单有效的方法。

Chapter 4: Synthesis of 1,5-diary 1-1,4-pentadien-3-ones from acetone or benzalacetone with aromatic aldehydes results in 86-97% yield with potassium hydroxide as catalyst under ultrasound irradiation in 5-60min.

为合成氰基环己醇找到一条方便高效的合成方法。第四章：研究了超声辐射下，以氢氧化钾为催化剂，芳香醛与丙酮及亚苄基丙酮之间反应合成1，5-双苄基-1，4-戊二烯-3-酮。

The ionic liquid [C_(12H_(25)_2-bim]Br was used as catalyst in the reaction of synthesizing the derivatives of benzil from aromatic aldehydes, which showed better catalytic effect, mild reaction conditions and higher yield.

利用合成的离子液体[C_(12H_(25)_2-bim]Br做催化剂，催化由芳醛合成偶酰的反应，催化效果较好，反应条件温和，产率较高。

Seven Schiff bases of N-(4-hydroxyphenylmethylene)-1-naphthylamine, N-(4-hydroxyphenylmethylene)-p-methoxyaniline, N-(4-hydroxyphenylmethylene)-benzylamine, N-(4-hydroxy-3-methoxyphenylmethylene) furfurylamine, N-(4-hydroxy-3-methoxyphenyl methylene)-p-methylaniline, N-(4-hydroxy-3-methoxyphenylmethylene)-p-methoxyaniline and N-salicylidene-4-aminoantipyrine were first synthesized by the one step solid phase reactions between aromatic aldehydes with phenolic hydroxyl and amines at room temperature without solvent.

分别以带酚羟基的芳醛与胺类反应，首次通过室温固相反应一步合成了N-（4-羟基苯基亚甲基）-1-萘胺、N-（4-羟基苯基亚甲基）-对甲氧基苯胺、N-（4-羟基苯基亚甲基）-苄胺、N-（4-羟基-3-甲氧基苯基亚甲基）糠胺、N-（4-羟基-3-甲氧基苯基亚甲基）-对甲苯胺、N-（4-羟基-3-甲氧基苯基亚甲基）-对甲氧基苯胺和N-亚水杨基-4-氨基安替比林7种Schiff碱，反应15min完成，产率均超过90％。

Moreover,the selective oxidation of primary and secondary alcohols to corresponding carbonyl compounds with the multinuclear copper complexes Cul-Cu4 as catalysts have been conducted using TBHP and O_2/TEMPO,respectively.Among them,the copper complex Cu3 showed the best performance.On the performances of the two classes of oxidants,benzylic and heterocyclic alcohols could be effectively oxidized to carbonyl compounds.Specifically,the secondary alcohols could be effectively oxidized to ketones with excellent selectivity up to 100%in the presence of TBHP and the allylic alcohols could be effectively oxidized to aldehydes in the presence of O_2/TEMPO system.

实验结果还表明，在TBHP或O_2/TEMPO存在下，各配合物催化剂均能使各种取代芳香伯/仲醇以及杂环醇等以不同程度的转化率和选择性转化成相应的醛或酮，其中，配合物Cu3在O_2/TEMPO存在下可使苯甲醇和烯丙醇等以较高转化率和近100%的选择性转化成相应的醛，而对其它芳香醇和脂肪伯/仲醇等的催化性能则较差；在TBHP存在下，配合物Cu3则可使1-苯乙醇和其它仲醇以较高转化率和近100%的选择性转化为相应的酮，但对各类其它伯醇选择氧化的性能相对较差。

The metabolites were mainly aldehydes and acids when the level of inoculation was 10~9cfu/ml, however, alcohols, acids and esters were produced when the level of inoculation was 10~8cfu/ml. The optimal temperature and pH for production of 3-methyl butanal were 40℃ and 7.0, but NaCl and NaNO_2 inhibited its production.

接种量不同会导致代谢BCAA的产物不同：接种量为10~9 cfu/ml时生成相应的醛和酸；接种量为10~8 cfu/ml时生成相应的醇、酸和酯。S52菌株在40℃，pH 7.0，无亚硝酸盐和NaCl的情况下产3-甲基丁醛的量最多。

The quantity ratio of four main esters in Taishan Tequ is reasonable, the content of caproic acid and acetic acid is comparatively higher in Taishan Tequ, the content of n-propanol is also a bit high, and the content of aldehydes is suitable.

泰山特曲具有合理的四大酯量比，己酸、乙酸含量较高，正丙醇含量稍高，适量的醛类物质。

In reality, readily characterizable high polymers are formed only from aliphatic aldehydes RCHO.

事实上有代表性的高聚物仅仅是由脂肪醛RCHO制得的。

In this paper We mainly studied the catalytic effect of crown ether for Darzens Glycidic Ester Condensation of aromatic aldehydes with ethyl chloroacetate in mixed solvent system .

本文着重研究了在混合溶剂中用冠醚作催化剂所进行的Darzens反应，并合成了四个芳族缩水甘油酸酯类化合物。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。