In the related "amide route" starting from 2-chloroisonicotinic acid, 41 ,a secondary amide directing group was used to facilitate the ortho lithiation of the pyridine 3-position.
在有关"酰胺三号"由2-氯酸、41、次要酰胺导演组用的锂方便邻吡啶3-立场.
| 单词 | directing group |
| 释义 |
directing group
英语例句库
In the related "amide route" starting from 2-chloroisonicotinic acid, 41 ,a secondary amide directing group was used to facilitate the ortho lithiation of the pyridine 3-position. 在有关"酰胺三号"由2-氯酸、41、次要酰胺导演组用的锂方便邻吡啶3-立场.
原声例句
BBC 听力 2015年3月合集 The Ukrainian president Petro Poroshenko has accused a senior Russian official of directing foreign sniper groups who shot and killed protesters during the uprising in Kiev exactly a year ago. 乌克兰总统佩特罗·波罗申科指控一名俄罗斯高级官员，称此人在一年前基辅起义中指示外国狙击手组织开枪杀死抗议者。 |
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