类化

Objective To separate flavonol and flavanonol by the column chromatography of polyamide.

目的采用聚酰胺柱色谱分离黄酮醇与二氢黄酮醇类。

Three novel malononitrile derivatives have been synthesized by the solid state reaction at room temperature.

固相反应成了新型丙二腈类。

Continued research on the Podophyllum lignans is currently focused on structure optimization to generate deriv...

优结构、寻找新的鬼臼毒素类资源替品,已成为当前进一步研究的主要方向。

This paper discussed three methods of producting vinyl etherspreparation from acetylene,dehydrohalogenation and acetals.

论述了乙烯基醚类的三种主要制备方法乙炔法、脱卤氢法和缩醛热分法。

This paper reviews the research and development of phosgene Derivates,including diphenyl ketone,chlorocarbonate,isocya-nate,acyl chloride and carbonates.

文综述了光气下游精细学品的开发及生产进展,包括二苯甲酮类、氯甲酯类、异氰酸酯类、酰氯类、碳酸酯类。

Dibenzofuran(DF) is one of the model compounds for the study of biodegradation of dioxin-like pollutants.

二苯并呋喃(DF)是研究二英类生降的模式之一。

In this gaper, the developments md study on biologically activeisoxazole derivatives and their applications in pesticide and medicine were reviewed.

许多异恶唑衍生显示良好的生活性，并被开发成为农用学品和医用学品。文对这类的研究开发动态进行了概述。

In order to get polyaryloxyphosphazene, polyphosphazene's side chlorines are directly substituted by aryloxy of phenol using triethylamine as the bind acid agent.

然后以三乙胺为缚酸剂，使高聚氯磷腈直接与酚类进行取反应，成了标题高聚。

The standards of polyphenols were used to identify the phenolic compounds in napiergrass and their changes due to growth period and season.

另外，利用十种酚类为标准品，测定不同生长期与季节之狼尾草中的酚类之变。

This thesis mainly introduced that ureas and semicarbazides were synthesized by oxidation of corresponding thioureas and thiosemicarbazides using 30% peroxide as oxidant.

文主要介绍了以30%浓度的双氧水作为氧剂氧硫脲、氨基硫脲来制备相应的脲和氨基脲类。

The oxidative dimerization of aryl methanes in organic solvents by using alkaline catalysts is an important way to prepare diphenyl ethanes and diphenyl ethylenes.

芳基甲烷在有机溶剂介质中、碱催下的氧缩反应,是成二苯乙烯(烷)类的重要途径.

More and more attention is being paid to their functions in anti-cancer, analgesia, regulating cholesterol level in the human body，preventing atheroma，deinsectization and other aspects.

柠檬苦素类在抗癌、镇痛、调节体内胆固醇水平、防止动脉粥样和除虫等方面的作用，越来越受到人们的重视。

Finally, we gained four esterifiable quinolone analogues (compounds 22 to 25) by modifying the structures of compound 3, 14 and 16 on 3 position.

同时利用所成的3，14，16为模板，对它们的3位羧基进行了酯反应成了4个喹诺酮酯类：22—25。

The structure of neostellerin, which was elucidated by NMR, especially 2D NMR analysis, was different from other daphnane type diterpenes isolated from this plant.

其中新狼毒素与其它从该种植中所分离得到的瑞香烷型二萜类有不同之处。

Under acid condition open chaining crown ether diaromatic aldehyde can react, and they will synthesize a compound of chaining crown ether diaromatic aldehyde thiosemi-carbazone kind.

摘要链状冠醚二芳醛在酸性条件下与氨基硫脲反应，成了链状冠醚二芳醛缩氨硫脲类。

Aqueous titanium trichloride promoted intermolecular reductive cyclization of 1,2 -diketone and o-nitroaniline in basic media provides a convenient method for the synthesis of quinoxaline derivatives.

文研究了三氯钛水溶液作用下,邻硝基苯胺与1,2-二酮在碱性介质中分子间的成环反应,提供了一个方便地成取喹喔啉类的方法。

Four compounds of phosphite ester and phosphoramide containing azido groups were synthesized. The molecular structure of the products has been confirmed by IR，1HNMR，FAB-MS and elemental analysis.

首次成了叠氮亚磷酸酯及叠氮磷酰胺类，并用IR、1HNMR、FAB-MS及元素分析对结构进行了鉴定。

Chromene and its derivatives are a large class of natural product.A lot of Chromene and its derivatives have biological activity.A natural chromene was separated in 1986.

苯并吡喃类及其衍生是一大类天然产,很多都都具有生活性,苯并吡喃天然产1#在1986年被分离得到。