芳烃

In our research on study chemical reaction of active methylene compounds and brom-acetophenone. Because of brom-acetophenone is compound that contain carbonyl and halogen ,which will take place electrophilic substitution and nucleophilic addition. When active methylene compounds are ethyl acetoacetate and β-diketone, controlling reaction condition, we have found that mono-substitution's production and di-substitution's. production is isolated; active methylene compounds are acetoacetanilide and acetoacetanilide derivate, pyrrolidin-2-one derivants were obtained by substitution and close-ring reaction .but there is no report about it.

本文是让活泼亚甲基类化合物与溴代苯乙酮发生化学反应，由于溴代苯乙酮是含有羰基的卤代烃结构，它可以发生亲电取代和亲核加成反应，当活泼亚甲基类化合物为乙酰乙酸乙酯和β-二酮时，控制反应条件可以发生单取代和双取代两种产物；当活泼亚甲基类化合物为乙酰乙酰芳胺类化合物来反应时，溴代苯乙酮中的羰基与氨基会发生分子内的关环反应生成吡咯烷-2-酮衍生物，这在以前的研究中是没有发现的。

If a hexagonal system H satisfies such property, that is, for a positive integer k and 1 t k, any t disjoint hexagons of H are mutually resonant, it is said to be k-resonant or k-coverable.

另一方面，从纯实验的角度出发，著名化学家Clar等发现，恰当地确定一个芳香性六隅体可预测出多环芳族烃的许多电性质。

The influence of the amount of catalyst, reaction temperature, molar ratio of β-methylnaphthalene and olefins, reaction time and the amount of solvent has also been studied in detail.

详细考察了三氯化铝催化剂用量、反应温度、芳烯物质的量比、反应时间及溶剂用量对β-甲基萘与长链烯烃烷基化的影响。

The major constituents were p-cymene,linalool,borneol and α-terpineol respectively.

产于山东沂山的五脉地椒全草挥发油主要成分为对-伞花烃、芳樟醇、龙脑、α-松油醇。

A series of antimony mercaptide compounds which formula are Sb 〓 and Sb S (CH〓〓COOR 〓(R represents an alkyl or aryl, aralkyl, n=0～2) have been synthesized. A new synthetic method has been invented to solve the defect of abroad patent method which has complex technological conditions and singleness intermediate compounds. A new catalyst QL-1 and preactivated antimony trioxide and other means have been used to avoid neutralizing, washing, separating and other procedures of intermediate and simplifing process flow at the same time. According to this new technique, a series of antimony mercaptides and their intermediate products have been synthesized with high yield.

合成了结构为SbS(CH〓〓COOR〓及Sb〓（R为烃基或芳烷基，n=0～2）的一系列硫醇锑化合物，针对国外专利报道的合成工艺存在着工艺条件苛刻，同时需多步完成，操作复杂，而且中间体品种单一的缺陷，发明了一种一步法合成硫醇锑化合物的新工艺，采用QL-1催化剂，且将三氧化二锑预先活化，变固—液相反应为液—液相反应，同时可免除中间体的中和、洗涤、分离等工序，工艺流程简化，产品收率高，且能制得系列硫醇锑产品。

Aromatic rings can be joined at a pair of adjacent carbons to yield compounds such as naphthalene, anthracene and chrysene

芳环能在一对相邻碳上结合，生成萘、葸和？傅然油母质中的芳香烃结构含有被苯环共振键稳定的自由电子。

This dissertation concentrated on its low-cost synthesis, adjusting of silica to alumina molar ratio and catalytic applications in olefinic alkylation of thiophenic sulfur of simulated FCC gasoline and aromatization of butene in liquefied-petroleum-gas process.

本论文旨在降低MCM-22合成成本，获得硅铝比范围宽泛可调的MCM-22，并拓展其在烯烃烷基化脱硫与液化气丁烯芳构化方面的应用。

The pyridinium salts was transformed by the base to 1-hydroxy or 3-hydroxy-quinolizinylides, which undergo 1,3-dipolar cycloadditionreaction with alkenes,and then aromatizated to cycl[3,3,2]azinone in thepresence of oxidant.

实验证明，这是一个连续进行的多步反应：2-羰基吡啶鎓盐在反应中先生成1-羟基或3-羟基喹嗪叶立德，然后与烯烃起1，3—偶极加成反应，最后在氧化剂作用下脱氢芳构化而生成Cycl[3，3，2]azinone。

A one-step method for the synthesis of aromatic indolizine derivatives byintramolecular 1,5-dipolar cyclization reaction of 2-(2-arylethenyl)pyridinium N-ylidesin the presence of an oxidant has been studied for the first time. In the presence ofelectron-deficient olefins, however, 2-(2-phenylethenyl)pyridinium N-ylides underwent1,3-dipolar cycloadditions and then aromatized in situ by TPCD to produce indolizinederivatives, indicating 1,3-dipolar cycloaddition proceed more readily than 1 ,5-dipolarcyclization in these conditions. Pyridinium disubstituted N-ylides, readily obtainedfrom corresponding pridinium and β-chlorovinyl ketone, underwent thermalintramolecular 1,5-dipolar cyclization to give indolizine derivatives easily.Indolizinecarbaldehyde derivatives were synthesized starting from 2-pyridinecarbaldehyde in four-steps involving 1,3-dipolar cycloaddition reaction.

本文首次研究了2-(2-芳基乙烯基)吡啶N-叶立德在氧化剂存在下的分子内1，5-偶极环化反应，采用一锅法合成了中氮茚衍生物；研究了这些N-叶立德的1，5-偶极环化和1，3-偶极环加成反应的选择性，发现当有缺电子烯烃存在时，优先进行1，3-偶极环加成反应，而不再发生分子内1，5-偶极环化反应；由β-氯乙烯酮方便地得到了烯丙基N-叶立德，他们在加热时进行分子内1，5-偶极环化反应而得到中氮茚衍生物；由2-吡啶甲醛为起始原料，通过1，3-偶极环加成反应等四步反应，得到了重要的中氮茚甲醛衍生物，这些反应都具有条件温和和操作简便的特点，是合成中氮茚衍生物的新方法。

This hypothesis is further confirmed by the aromatization of- o-(2′-iodoethynyl)phenyl alkynes with alcohols.

这一假设进一步证实了芳构化邻（ 2'- iodoethynyl ）苯基炔烃醇。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。