查询词典 ethylamine

The results indicate that the optimized sulfonylation reaction time is 4 h, the materiel rate of chlorosulfonic acid and 2-chloroimidazo[1,2-α]pyridine is 1.2 : 1, with ethylamine the yield increasing from 15.4% to above 70%; the optimized ammonolysis reaction time is 3 h and the reaction temperature is 27℃, with the acetonitrile yield increasing from 60.1% to above 79.6%.

实验结果表明，磺酰化反应的最佳反应时间为4 h，氯磺酸与2-氯咪唑并[1，-α]吡啶的用量比为1.2：1，加入三乙胺可将收率由15.4%提高到70%以上；氨解反应的最佳反应时间为3 h，反应温度为27 ℃，加入乙腈可将收率由60.1%提高到79.6%；方案经改进后，总反应时间缩短3 h，收率提高了5.5%。

The synthesis method comprises the following steps: adding 2-( 5-(dimethylamino methyl- 2- furyl methyl sulpho ethylamine and 1- methylthio- 1- methylamino- 2- nitro ethylene with a molar ratio of 1.04: 1 into water, heating to 48- 52 Deg. C, reacting 4.5 hours with a vacuum degree of 0.02- 0.05 MPa, cooling, adding sodium-hydroxide of concentration of 10% to regulate the PH value to 11.0- 11.4, filtrating and cooling the filtrate to 0- 2 Deg. C, crystallizing for 12 hours, centrifugally filtrating, and rinsing filter cake with purity water to prepare wet ranitidine alkali; dissolving ranitidine alkali in alcohol and reacting with chlorhydric acid to prepare ranitidine hydrochloride.

合成方法包括：将摩尔比为1.04∶1的2-(5-(二甲氨基甲基-2-呋喃基甲基硫代乙胺与1-甲硫基-1-甲胺基-2-硝基乙烯加入水中，升温至48-52℃，于真空度0.02～0.05MPa反应4.5小时，反应完毕降温，用10％氢氧化钠溶液调pH＝11.0-11.4，抽滤，滤液降温至0～2℃，结晶12小时，离心甩滤，用纯化水漂洗滤饼，得雷尼替丁碱湿品；将雷尼替丁碱溶于乙醇中与盐酸反应，制备得到盐酸雷尼替丁，产品符合欧洲药典标准。

Chocolate, along with coconut, pecans, and many more, all contain phenyl ethylamine, a chemical that produces the feeling of being in love.

巧克力，还有椰子，山核桃，更多的人，都含有苯基乙胺，一种化学物质，产生的感觉正在恋爱。

Chocolate, along with coconut, pecans, and many more, all contain phenyl ethylamine, a chemical that produces the feeling of "being in love." Good place to start, dont you think?

巧克力，随着椰子， pecans ，还有更多的，都含有苯基乙胺，化学品产生的感觉"在爱"的好地方开始，唐的 T你觉得呢？

Using ethylamine as a preswelling agent, a detailed study of the effect of solvent, amount of amine added, reaction time has been carried out. Among these the dielectric constant of the solvent has been found to be the most important factor.

以乙胺为预撑剂，详细考察了溶剂、胺的加入量、反应时间等因素的影响，发现溶剂的介电常数是影响这类晶体剥离和嵌入的最重要的因素。

They say love is in several human hormone under the control of a series of biochemical reactions, and the most basic material is love "phenyl ethylamine", referred to as PEA, it can make people feel excited and full of courage.

他们说，爱情是在几种人体激素控制下的一系列生物化学反应，而最基本的爱情物质是"phenyl ethylamine"，简称PEA，它能让人感到兴奋、充满勇气。

Effects on the reaction of factors such as reactant ratio, reaction time, and reaction temperature were investigated, and optimum reaction conditions were determined as follows: mole ratio of cyanuric chloride to ethylamine to sodium hydroxide to sodium methyl mercaptide was 1:2.1:2.0:1.7, and the temperature and time of the first, second, and third substitution reactions were -2, 0, and 82℃ and 30, 60, and 180 min, respectively.

讨论了原料配比、反应时间和反应温度等因素对反应的影响，获得了较佳的反应条件。较佳反应条件为三聚氯氰：乙胺：氢氧化钠：甲硫醇钠＝l：2.1：2.0：1.7，第一、第二、第三取代反应的反应温度和反应时间分别为-2℃、0℃、82℃和30、60、180min。

The optimum conditions were as follows: ethylamine was 370 mmol; n:n:n was 1.0:2.1:2.1; PEG-600 was 5 mol%; the first stage reaction was carried out at 42 ℃ for 6 h and the rsecond stage reaction was at 60 ℃ for 7 h.

较佳的反应条件为：乙胺370 mmol，n：n：n=1.0：2.1：2.1，PEG-6005 mol%，第一段于42℃反应6 h；第二段于60℃反应7 h，收率71.58%。

We designed and simulated the ethylamine separation system using Aspen Plus. The optimal parameters such as theoretical plate number and reflux ratio were obtained.

利用模拟软件Asp-en Plus对乙基胺分离系统进行了设计和模拟计算，得到了各塔理论板数和回流比等设计参数。

This paper presents the synthesis of three kinds of amine such as 2-(methyl- sulonyl)ethylamine,3-propylamine and 2--ethylamine via three different methods.

本文采用三种不同的方法合成了2-乙胺，3-丙胺，2-乙胺等3个含砜基伯胺；还合成了3--x-吲哚甲酸甲酯(x=5，6，7)， E-4-喹啉甲醛肟，E-6-氟-2-吡啶甲醛肟等三类芳环甲醛肟，其中吲哚类和吡啶类化合物未见文献报道。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。