芳香化合物

Asymmetric hydrogenation of quinoline derivatives is a hot topic in asymmetric hydrogenation. However, some problems still remained.

芳香杂环化合物喹啉衍生物的不对称氢化一直是不对称氢化领域的一个热点，然而对于苄基取代喹啉和一些多取代的喹啉衍生物至今没有实现有效的不对称氢化。

Six calix[4]recorcinarenes are synthesized by the reaction of resorcin as substrates with six aromatic aldehydes, respectively.

以间苯二酚为反应底物，分别与六种芳香醛合成了相应的杯[4]间苯二酚芳烃，并通过红外光谱和氢核磁共振谱对这些化合物进行了表征。

From the structure, tetraazaparacyclophane is a ring compound with benzene rings connected by nitrogen-containing carbon bridges. It has a well-defined hydrophobic cavity.

四氮杂环蕃从结构来看是由氮杂碳桥将芳香环连起来的环状化合物，分子内具有空腔，该空腔上的芳环呈侧立状，具有一定的深度，并具有疏水性。

As suitable solvents for applying a coloring substance which is, eg, a triphenylmethane dye, organic liquids such as aliphatic alcohols, ketones, esters and aromatic hydrocarbons can be used.

至于申请一着色物质，例如，一三苯甲烷染料，如脂肪醇，酮，酯和芳香族碳氢化合物有机液体可以使用合适的溶剂。

The efficacy of aromatic diamidines in the treatment of protozoal diseases was first recognized in the 1930s by investigators searching for agents with therapeutic activity against African trypanosomiasis .

早在1930年，人们在寻找治疗非洲锥形虫症药物时首先发现了芳香二脒类化合物具有治疗原虫疾病的作用，临床试验表明戊烷脒及其类似物对非洲人早期锥形虫症和黑热病具有疗效。

ABSTRACT Fruit ripening is associated with a number of physiological and biochemical changes including degradation of chlorophyll, carotenoid biosynthesis, synthesis of flavor compounds, conversion of starch to sugars, cell wall solublisation and fruit softening.

果实的发育成熟涉及一系列复杂的生理生化变化，包括叶绿素的降解、类胡萝卜素的合成、淀粉向糖的转化、芳香性化合物的合成、细胞壁溶解和果实软化等。

Reaction (1) was examined with different kinds of acetal substrate(1) and vinyl ethyl ether, and the results indicated that the 1, 1,3-triethoxy compounds could be obtained in high yields of 88 and 97% respectively when the R groups of the acetal are phenyl and anisyl, while the yields amounted only to 55-75 % for R=a...

有证据表明这种催化反应也可能是通过正碳离子中间体进行的。本反应的产物1，1，3-三乙氧基化合物经乙酸/乙酸钠溶液水解可得反式α，β-不饱和醛。水解产率：芳香族产物大于90%，脂肪族产物大于75%。

When anthrone react with aryl aldehyde in the presence of pyridine by using xylene as the solvent,besides 10 arylmethylene anthrone derivatives we found other oxygenated anthrone which have not been reported.

发现其生成物中除含有目标化合物 1 0 -芳香基甲叉基蒽酮外，还含有部分文献中没有报道的蒽酮氧化物，经物理方法确定其为蒽醌。

Narrowbandoverlapped capillary electrophoresis signals of five arylamine mixtures have been studied by this method and satisfactory results are achieved.

应用于5个芳香胺类化合物的混合物的毛细管电泳窄锐重叠信号的处理，得到满意结果。

Azo aromatic compounds exist widely in the world and millions of tons of azo compounds are produced each year.

偶氮芳香族化合物在自然界广泛存在，而且每年以数百万吨的数量被制造出来。

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。