Six series of aryloxy pyridazines derivatives have been synthesized starting from 3,6 dichloro pyradizine.
以3,6-二氯哒嗪为原料,合成了6类芳氧基哒嗪类衍生物,研究了它们的合成方法,并测定了所得产物的除草活性。
| 单词 | starting from |
| 释义 |
starting from
英语例句库
Six series of aryloxy pyridazines derivatives have been synthesized starting from 3,6 dichloro pyradizine. 以3,6-二氯哒嗪为原料,合成了6类芳氧基哒嗪类衍生物,研究了它们的合成方法,并测定了所得产物的除草活性。 P-methoxybenzeneacetonitrile was prepared in 34. 8% yield starting from anisole, via chloromethylation, cyanogenation and fractional distillation. 以苯甲醚为原料,经过氯甲基化,氰化反应后,通过精馏获得对甲氧基苯乙腈,总收率为34.8%。 The primary synthetic methods of 4-hydroxycoumarin was reviewed starting from phenol, 2-acetylsalicylic acid, methyl salicylate, and o-hydroxyacetophenone respectively. 概述了4-羟基香豆素的合成方法，重点介绍了苯酚法，乙酰水杨酸法，水杨酸甲酯法，邻羟基苯乙酮法。 In this paper, synthesis of salidroside was reported starting from 4 hydroxyl phenylacetic acid through benzylation, esterification, reduction and glycosidation. 报道了以对羟基苯乙酸为原料,经过苄基化、酯化、还原、甙化等步骤合成红景天甙的一种方法. A process for the preparation of anticholinergic drug Cyclopentolate Hydrochloride by two-step sequence starting from sodium Phenylacetate in about 50% total - yield was reported. 探索抗胆碱药盐酸环喷托酯的合成工艺。该工艺以苯乙酸钠为原料,经两步化学反应得到目标产品,总产率约50％。 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
当月 CNN 10 学生英语 2019年9月合集 In my case, I'm starting from the bottom which most persons are starting from the bottom. 我的情况就是，我要从头再来，多数人都是从头再来。 历年四级听力真题精听 Let's begin our tour starting from the rooms. 让我们从房间开始参观吧。 CRI在线 2023年8月合集 China has also decided to suspend the imports of all aquatic products originating from Japan starting from Thursday. 中国还决定从周四开始全面暂停进口原产于日本的水产品。 科学60秒-科学美国人 2019年7月合集 So, could we resurrect one starting from their protein sequences? 那么，我们能从它们的蛋白质序列入手并复活一只鱼龙吗？ 科学60秒-科学美国人 2021年12月合集 But that doesn't mean we are starting from scratch. 但这不意味着我们要从头开始。 VOA慢速英语_单词故事 Starting from scratch can also mean starting something over from the beginning. " 从零开始" 也可以指从头开始做某事。 艺术巨作揭秘 But Michelangelo worked mostly freehand starting from the front and working back. 但米开朗基罗基本上是徒手画的，从正面画到背面都是。 VOA常速英语_娱乐 I did not know that the odd-even rule was starting from today. " 我不知道今天就开始实行单双号限行。 CRI在线 2021年6月合集 Athletes, coaches and officials will begin to check-in starting from July 13th. 运动员、教练员和官员将从7月13日开始入住。 演员对谈（双语精选） I think with each time you're sort of starting from nothing, right? 我认为每一次你都是从无到有，对吗？ CRI在线 2015年6月合集 President John Mahama has annouced three days of national mourning starting from Monday. 加纳总统约翰·马哈马宣布自周一起举行为期3天的全国哀悼。 CRI在线 2022年4月合集 Shanghai will conduct city-wide nucleic acid screening in batches starting from Monday morning. 上海将从周一上午开始在全市范围内分批开展核酸检测。 NPR音讯 2018年3月合集 In fact, he seems to relish throwing out the books and starting from scratch. 实际上，他看起来喜欢摆脱那些简报，然后从头开始。 CNN 听力 2013年11月合集 But we're starting with election results and some votes of note from Tuesday. 但我们首先从周二的选举结果和一些选票开始。 CRI在线 2022年1月合集 Several preliminary events will be held starting from two days before the opening ceremony. 几项预赛将从开幕式前两天开始举行。 BEC中级听力真题（第4辑） Why not make the most of what we've got, instead of starting from scratch? 为什么不好好利用我们现在有的场所而要从头开始呢？ VOA常速英语_美洲 New dates were opened starting from August 3rd so I signed up for August 4th. 新的日期从8月3日开始，所以我报名参加8月4日的面签。 CRI在线 2020年7月合集 President Nicholas Maduro has also announced a dual pricing scheme for gasoline starting from Monday. 总统尼古拉斯·马杜罗还宣布了一项汽油双重定价方案，该方案于周一开始实行。 CRI在线 2022年8月合集 Finnair says it will resume weekly flights from Helsinki to Guangzhou starting from Sept. 6. 芬兰航空表示，将从 9 月 6 日起恢复赫尔辛基至广州的每周航班。 CRI在线 2020年10月合集 China will allow cinema capacity limits to increase to 75 percent starting from September 25. 从9月25日起，中国将允许影院上座率上限提升到75%。 |
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