查询词典 aromatic

The first part is concerned with catalytic asymmetric borane reduction of aromatic ketones. Up to 83% ee could be obtained with 10 mol% Al3/BINOL2 complex as catalyst.

在不对称硼烷还原反应方面，利用BINOL作为掌性配位基与Al3组成催化系统还原芳香酮类，反应过程方便快速，最高可获得83%的镜像超越值，我们也推测了可能的反应机构并用以解释所得产物的立体化学组态。

This PhD thesis mainly summarizes the original results on studies of aromatic amide-derived phosphines,including the precatalyst system consisting of Aphos and Pd_2 and the applications for promoting room temperature Suzuki cross-coupling of aryl chlorides and aryl/vinyl bromides,respectively,with aryl/vinyl boronic acids,and alkyl boranes.

本博士学位论文主要总结了对芳基酰胺衍生的膦配体的研究，以及该类型配体与Pd_2组成的催化剂在室温下催化氯代芳烃、溴代芳烃、溴代烯烃分别同芳基硼酸、烯基硼酸及烷基硼试剂进行的Suzuki偶联反应中的表现。

Using the CuCl CO 2 as catalyst, the processes of alkoxylation of non activated aromatic bromides were studied.

使用CuCl－CO2为催化剂，研究了非活性芳香溴化物烷氧基化反应条件。

The olefmation of benzyl zinc bromides with aromatic aldehydes, which has some theoretical means and good application expectation, has good stereoselectivity and regioselectivity.

烯基化反应具有较好的立体选择性和区域选择性，具有一定的理论意义和较好的应用前景。

What about the stories between aromatic camphors?

1995夏至？香樟？未知地香樟与香樟的故事，什么样？

Based on the experimental results, it could be consequentially concluded that N-methoxycarbonylation of aromatic amines was followed by the exclusive N-methylation of methyl N-aryl carbamates during the reaction process.

苯环上有钝化基团的一级芳胺反应活性比较好，获得N-甲基-N-芳基氨基甲酸甲酯的产率较高，反应时间也较短；而苯环上活化基团的存在，则会降低一级芳胺的反应活性。

The blend includes carefully selected coffees, a percentage of Brazilian arabicas giving a delicate and chocolaty flavor, highly aromatic Central American arabicas, and finally, a small quantity of Indonesian coffees that give the blend a rounder and fuller-bodied taste.

这一款配方包括各种精选的咖啡豆，一定比率的巴西豆提供了一种精致的巧克力味道，高香度的中美洲阿拉比卡豆，和最后少量的印度尼西亚咖啡给了这个配方一个更加柔顺和更有醇度的味道。

Mozzie buster is cell fusion product of Africa"s Geranium and China"sCymbopogon citrates. It is a kind of aromatic perennial herb plant.

驱蚊草，芳香类天竺葵多年生草本植物，它是非洲的天竺葵和中国的香茅草的细胞融合的产物。

And stems of currants and plum-blows, and the aromatic cedar

几枝醋栗和梅花，还有芳香的雪杉

"Diazo:Relating to or containing a pair of bonded nitrogen atoms, one of which is also bonded to an aromatic hydrocarbon."

&重氮的：关于或含有一对结合的氮原子的，其中一个还结合一个芳烃。&

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。