Opt Options or Optional

用法例句

The effect of type of functional monomers,as well as degree of cross-linking on the regioselectivity of nitration reaction,is studied.

成功地将分子印迹聚合物用于催化NO2硝化反应,探讨合成分子印迹聚合物所用的功能单体种类、交联度等对甲苯的NO2硝化反应位置选择性的影响。

In this system good regioselectivity can be achieved mainly because of the existence of a porous support and the low dielectric constant of the reaction media.

一定条件下该硝化剂具有较好的反应位置选择性，这一是由于反应介质低的介电常数，二是多孔载体也具有明显的作用。

In the two-phase nitration of phenol in the persence of β-CD,the regioselectivity of the reaction could be improved markedly,factors such as the polarity of the organic solvents,the amount of sodium nitrate used and reaction temperature have been investigated.

β－ＣＤ存在下对苯酚进行两相硝化反应，可以明显改善反应的位置选择性。

An improved regioselective synthesis of 6-chloro-1H-quinoxalin-2-one by using p-chloroaniline as a starting material was described.

设计了以对氯苯胺和氯乙酰氯为原料 ,经缩合、硝化、还原、环合、氧化五步制得 6 氯 2 ( 1H) 喹喔酮的位置选择性合成方法 ,并对以氯乙酰氯作为苯胺的氨基保护试剂进行硝化的反应和对含活泼氯的硝基化合物进行还原的反应进行了研究 。