助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   - isopropyl 的翻译结果: 查询用时:0.17秒
图标索引 在分类学科中查询
所有学科
更多类别查询

图标索引 历史查询
 

- isopropyl
相关语句
  相似匹配句对
     Isopropyl Palmitate
     棕榈酸异丙酯
短句来源
     Preparation of isopropyl ethylthionocarbamate
     乙硫氨酯的制备
短句来源
     Synthesis of N-Isopropyl Maleinamic Acid
     N—异丙酸基顺丁烯-酰胺酸的合成
短句来源
     Synthesis and Applications of p-Isopropyl Aniline
     对异丙基苯胺的合成及应用
短句来源
查询“- isopropyl”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  - isopropyl
Synthesis, stereochemistry, and antimicrobial evaluation of t(3)-isopropyl-r(2), c(6)-di-2'-furanylpiperidin- 4-one and its deri
      
Pretreatment of plant seeds with kartolin-4 (o-isopropyl-N-2-hydroxyethyl carbamate), a preparation with cytokinin activity, reduced the dehydration-induced inhibition of enzymatic activity.
      
The 2-isopropyl groups influenced catalyst activity, molecular weight, and the relative amounts of microstructure errors.
      
In contrast to procatalysts with only 2-methyl groups, polymer molecular weights increased in E/P copolymerizations with 2-isopropyl substituted complexes.
      
Mutual Solubility of Components and Critical Solution Points in the System Water-Isopropyl Alcohol-n-Dodecane in the Temperature
      
更多          


4-Methyl-5-ethyl-2-thiouracil,m.p.211°,was prepared according to the direc- tions of Johnson and Baily.4-Methyl-5-ethyl-uracil,m.p.236°,was formed in a 81% yield from 4-methyl-5-ethyl-2-thiouracil by boiling the latter with an aqueous solution of monochloroacetic acid.4-Methyl-5-ethyl-uracil reacted with phosphorous oxychloride and phosphorous pentachloride,giving 4-methyl-5-ethyl-2,6-dichloropy- rimidine in a 79% yield.This dichloropyrimidine boiled at 145° at 23mm,at 120° at 9mm,at 130° at 10mm,or at 130°...

4-Methyl-5-ethyl-2-thiouracil,m.p.211°,was prepared according to the direc- tions of Johnson and Baily.4-Methyl-5-ethyl-uracil,m.p.236°,was formed in a 81% yield from 4-methyl-5-ethyl-2-thiouracil by boiling the latter with an aqueous solution of monochloroacetic acid.4-Methyl-5-ethyl-uracil reacted with phosphorous oxychloride and phosphorous pentachloride,giving 4-methyl-5-ethyl-2,6-dichloropy- rimidine in a 79% yield.This dichloropyrimidine boiled at 145° at 23mm,at 120° at 9mm,at 130° at 10mm,or at 130° at 11mm;and melted at 33°.This dichloropyrimidine reacted with sodium methoxide in methyl alcohol,with sodium ethoxide in ethyl alcohol,with sodium n-propoxide in n-propyl alcohol,with sodium isopropoxide in isopropyl alcohol,with sodium n-butoxide in n-butyl alcohol,with sodium isobutoxide in isobutyl alcohol,with sodium isopentoxide in isoamyl alcohol and with sodium benzoxide in benzyl alcohol,giving the corresponding 2,6-dimethoxy-pyrimidine(b.p.113°/13mm,107°/7mm,115°/15mm,or 125°/ 18mm,),2,6-diethoxy-pyrimidine(b.p. 143°/20mm),2,6-di-n-propoxy-pyrimidine (b.p.131°/5mm),2,6-di-isopropoxy-pyrimidine(b.p.114°/5mm),2,6-di-n-butoxy- pyrimidine(b.p.175°/7mm),2,6-di-isobutoxy-pyrimidine(b.p.155°/5mm),2,6-di- isopentoxy-pyrimidine(b.p.170°/5mm)and 2,6-di-benzoxy-pyrimidine (b.p.221°/ 3mm)respectively. 4-Methyl-5-ethyl-2,6-dimethoxy pyrimidine rearranged partially in the pre- sence of methyl iodide at room temperature into 2-oxy-3,4-dimethyl-5-ethyl-6- methoxy-pyrimidine, m.p.81°,the structure of which was established by its be- havior on hydrolysis in the presence of concentrated hydrochloric acid,giving 3,4-dimethyl-5-ethyl-uracil,m.p.170-171°.Nevertheless,4-methyl-5-ethyl-2,6-di- methoxy-pyrimidine rearranged with ease into the isomeric and stable configura- tion,1,3,4-trimethyl-5-ethyI-uracil(b.p.190°/7mm,m.p.99-100°)by merely heat- ing at 280°-290° for six hours.Furthermore,the partially rearranged configura- tion,like 2-oxy-3,4-dimethyl-5-ethyl-6-methoxy-pyrimidine,was only stable,however, at this lower temperature;and further transformation into the isomeric and com- pletely rearranged modification took place by heating at 335-350° for six hours. In this case,1,3,4-trimethyl-5-ethyl-uracil(m.p.99-100°)was similarly isolated.

(1)4-甲基5-乙基-2,6-二氯代嘧啶曾用磷醯氯和五氯化磷与其相应的2,6-二羟基嘧啶作用制取。(2)4-甲基-5-乙基-2,6-二氯代嘧啶与醇钠作用,极易转变成4-甲基-5-乙基-2,6-二烷氧基嘧啶。(3)4-甲基-5-乙基-2,6-二甲氧基嘧啶和2-氧代-3,4-二甲基-5-乙基-6-甲氧基嘧啶在高温时重排成其稳定构型的(或称内醯胺)的异构体:1,3,4-三甲基-5-乙基-2,6-二氧代嘧啶。另一方面,4-甲基-5-乙基-2,6-二甲氧基嘧啶用碘代甲烷处理并长久放置则仅仅发生部分重排作用,得到2-氧代-3,4-二甲基-5-乙基-6-甲氧基嘧啶。

4-Methyl-2,6-dichloropyrimidine was prepared by heating 4-methyl-uracil with phosphorous oxychloride in the presence of phosphorous pentachloride; and it boiled at 97° at 7 mm, at 102° at 10 mm, or at 113° at 13 mm. 4-Methyl-2,6- dichloropyrimidine reacted with sodium methoxide in anhydrous methyl alcohol, forming 4-methyl-2,6- dimethoxy-pyrimidine, which was isolated by ether extraction and pnrified by vacuum distillation. Pure 4-methyl-2,6-dimethoxy-pyrimidine boiled at 85-87° at 7 mm, or at 103° at 13 mm,...

4-Methyl-2,6-dichloropyrimidine was prepared by heating 4-methyl-uracil with phosphorous oxychloride in the presence of phosphorous pentachloride; and it boiled at 97° at 7 mm, at 102° at 10 mm, or at 113° at 13 mm. 4-Methyl-2,6- dichloropyrimidine reacted with sodium methoxide in anhydrous methyl alcohol, forming 4-methyl-2,6- dimethoxy-pyrimidine, which was isolated by ether extraction and pnrified by vacuum distillation. Pure 4-methyl-2,6-dimethoxy-pyrimidine boiled at 85-87° at 7 mm, or at 103° at 13 mm, and melted at 62-65°. It was recrystallized from petroleum ether, m.p. 65-66°. In the above reaction, there was isolated a white solid, suspending in the ethereal solution and being collected separately. This white solid, considered as a by-product, was dissolved in hot water and acidified with acetic acid, whereupon it separated in needles. After recrystallization from water, it melted at 201-202°. It was tentatively assigned to be 4-methyl-2-methoxy- uracil. Further, 2,6-dialkoxy-pyrimidines were prepared similarly as 4-methyl-2,6-dimethoxy- pyrimidine: 4-Methyl-2,6-dichloropyrimidine reacted with sodium ethylate in anhydrous ethyl alcohol, forming 4-methyl-2,6-diethoxy-pyrimidine, which boiled at 110°/11 ram. 4-Methyl- 2,6-dichloropyrimidine was treated with sodium n-propoxide in normal propyl alcohol, forming 4-methyl-2,6-di-n-propoxy-pyrimidine, which boiled at 120°/5 mm. 4-Methyl- 2,6-dichloropyrimidine reacted with sodium iso-propoxide in isopropyl alcohol, forming 4-methyl-2,6-di-isopropoxy-pyrimidine, which boiled at 103°/3 mm. The action of sodium n-butoxide in normal butyl alcohoI upon 4-methyl-2,6-dichloropyrimidnie gave 4-methyl- 2,6-di-n-butoxy-pyrimidine, which boiled at 147-148°/5 mm. The action of sodium isobutoxide in isobutyl alcohol upon 4-methyl-2,6-dichloropyrimidine gave 4-methyl-2,6- isobutoxy-pyrimidine, which boiled at 132-133°/6 mm. The action of sodium isopentoxide in isopentyl alcohol upon 4-methyl-2,6-dichloropyrimidine gave 4 methyl-2,6-di-isopentoxy- pyrimidine, which boiled at 145-146°/3 mm. 4-Methyl-2,6-dichloropyrimidine reacted with sodium benzoxide in benzyl alcohol, giving 4-methyl-2,6-dibenzoxy-pyrimidine, which boiled at 231°/6 mm. 4-Methyl-2,6-dimethoxy-pyrimidine was heated in a sealed tube at 330-350°, giving the completely rearranged isomeric compound, 1,3,4-trimethyl-uracil, which was purified by vacuum sublimation at 130° at 10 mm and then by recrystallization from 95% alcohol. The latter melted at 107-109°. Nevertheless, 4-methyl-2,6-dimethoxy-pyrimidine was dis- solved in methyl iodide, and kept at room temperature in the dark with occasional shaking; whereupon the partially rearranged product, 2-oxy-3,4-dimethyl-6-methoxy-pyrimidine, gradually separated out. After recrystallization from absolutealcohol, it melted at 134-135.5°. Its structure was established as follows: Pure 2-oxy-3,4-dimethyl-6-methoxy-pyrimidine was heated with dilute hydrochloric acid for one hour; whereupon 3,4-dimethyl-uracil, m.p. 220-221°, separated out. This partially rearranged product, 2-oxy-3,4-dimethyl-6-methoxy- pyrimidine was heated at 335-350° and was again transformed into its stable and completely rearranged modification, 1,3,4-trimethyl-uracil, which was purified by vacuum sublimation and then recrystallization from 95% alcohol. The latter melted at 109-110°.

(1)4-甲基-2,6-二氯代嘧啶與鈉醇和醇的溶液作用,可以形成相應的2,6-二烴氧基嘧啶。 (2)4-甲基-2,6-二甲氧基嘧啶加熱至高温度即可轉變成其穩定結構的異構體1,3,4-三甲基-2,6-二羥基嘧啶。另一方面,在碘代甲烷催化劑的影響下,部份轉變成2-氧代-3,4-二甲基-6-甲氧基嘧啶;此化合物加熱卽可發生完全的轉變作用而形成其異構體1,3,4-三甲基-2,6-二羥基嘧啶。

2-Isopropyl-5-methyl-7-ketohexamethylenimine was prepared by a process starting with men-

1.2-异丙基-5-甲基-7-酮-氮七圜是由薄荷醇开始按照与 Wallach 非常相似的方法制备的。2.用氢化铝锂将2-异丙基-5-甲基-7-酮-氮七圜还原成为2-异丙基-5-甲基-氮七圜。此化合物与三氯乙醛起作用,成为1-甲酰基的衍生物;此物再用氢化锂还原生成1-甲基-2-具丙基-5-甲基-氮七圜。3.2-异丙基-5-甲基-氮七圜与氯乙醇作用,生成其1-(β-羟乙基)的衍生物;此衍生物和氯化亚硫酰起反应而变成1-(β-氯乙基)-2-异丙基-5-甲基氮七圜的盐酸盐。4,1-(β-羟乙基)-2-异丙基-5-甲基氮七圜的对硝基苯甲酸酯及对氨基苯甲酸酯,皆用常法制备,对后者的局部麻醉效能曾作测定,但因刺激性过强,未宜作此种药品用。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关- isopropyl的内容
在知识搜索中查有关- isopropyl的内容
在数字搜索中查有关- isopropyl的内容
在概念知识元中查有关- isopropyl的内容
在学术趋势中查有关- isopropyl的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社