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isopropyl     
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  异丙基
     Improvement in the synthesis of N,N′,N″-tri(isopropyl)-1,4,7-triazacyclononane
     N,N′,N″-三(异丙基)-1,4,7-三氮杂环壬烷的合成改进
短句来源
     Synthesis of Methyl Isopropyl Ketone and Diethyl Ketone on ZrO_2/MnO_x/ZnO Catalyst
     ZrO_2/MnO_x/ZnO催化剂上合成甲基异丙基酮和二乙基酮
短句来源
     Theoretical Studies on the C-H Bond Insertion Reaction of CX_2(X=H,F,Cl) with Methyl Isopropyl Ether
     CX_2(X=H,F,Cl)与甲基异丙基醚C-H键插入反应的理论研究
短句来源
     exo N (2 ethyl)hexyl 1 isopropyl 4 methylbicyclo[2,2,2] 5 octene 2,3 dicarboximide(2) was synthesized from exo 1 isopropyl 4 methylbicyclo[2,2,2] 5 octene 2,3 dicarboxyl anhydride, which was obtained from α terpinene and maleic anhydride.
     由 α-松油烯合成外 ( exo) α-松油烯 -马来酸酐加成物 ,再与 2 -乙基己胺反应合成外 ( exo) N- ( 2 -乙基 )己基 - 1 -异丙基 -4-甲基二环 [2 ,2 ,2 ]- 5-辛烯 - 2 ,3-二甲酰亚胺 ( 2 )。
短句来源
     Synergist A 1 was purified to obtain endo N (2 ethyl)hexyl 1 isopropyl 4 methylbicyclo[2,2,2] 5 octene 2,3 dicarboximide(1) with column chromatographic method.
     利用硅胶柱层析方法 ,提纯增效剂 A1得到内 ( endo) N- ( 2 -乙基 )己基 - 1 -异丙基 - 4-甲基二环 [2 ,2 ,2 ]- 5-辛烯 - 2 ,3-二甲酰亚胺 ( 1 )。
短句来源
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  异丙酯
     Synthesis of Isopropyl Chloroacetate Catalyzed by TiSiW_(12)O_(40)/TiO_2
     TiSiW_(12)O_(40)/TiO_2催化合成氯乙酸异丙酯
短句来源
     Catalytic Synthesis of Isopropyl Salicylate with SO_4~( 2-) 4/TiO_2/La~(3+) Solid Superacid
     SO_4~(2-)/TiO_2/La~(3+)固体超强酸催化合成水杨酸异丙酯
短句来源
     Synthesis of Isopropyl p-Hydroxybenzoate with SnCl_4·5H_2O as Catalyst
     SnCl_4·5H_2O催化合成对羟基苯甲酸异丙酯
短句来源
     Isopropyl chloroacetale was by solid superacid SO42-/Z rO2-Al2O3 as catalysts.
     本文采用固体超强酸SO42-/Z rO2-Al2O3作催化剂,合成氯乙酸异丙酯
短句来源
     Catalytic Synthesis of Isopropyl Chloroacetate with Activated Bentonite Supported SO_4~(2-)- Al_2O_3
     活性白土负载SO_4~(2-)- Al_2O_3催化合成氯乙酸异丙酯
短句来源
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     Synthesis of Isopropyl Chloroacetate Catalyzed by TiSiW_(12)O_(40)/TiO_2
     TiSiW_(12)O_(40)/TiO_2催化合成氯乙酸丙酯
短句来源
     Catalytic Synthesis of Isopropyl Salicylate with SO_4~( 2-) 4/TiO_2/La~(3+) Solid Superacid
     SO_4~(2-)/TiO_2/La~(3+)固体超强酸催化合成水杨酸丙酯
短句来源
     Isopropyl chloroacetale was by solid superacid SO42-/Z rO2-Al2O3 as catalysts.
     本文采用固体超强酸SO42-/Z rO2-Al2O3作催化剂,合成氯乙酸丙酯。
短句来源
     Synthesis of Isopropyl p-Hydroxybenzoate with SnCl_4·5H_2O as Catalyst
     SnCl_4·5H_2O催化合成对羟基苯甲酸丙酯
短句来源
     Catalytic Synthesis of Isopropyl Chloroacetate with Activated Bentonite Supported SO_4~(2-)- Al_2O_3
     活性白土负载SO_4~(2-)- Al_2O_3催化合成氯乙酸丙酯
短句来源
更多       
  异丙酯
     Synthesis of Isopropyl Chloroacetate Catalyzed by TiSiW_(12)O_(40)/TiO_2
     TiSiW_(12)O_(40)/TiO_2催化合成氯乙酸异丙酯
短句来源
     Catalytic Synthesis of Isopropyl Salicylate with SO_4~( 2-) 4/TiO_2/La~(3+) Solid Superacid
     SO_4~(2-)/TiO_2/La~(3+)固体超强酸催化合成水杨酸异丙酯
短句来源
     Synthesis of Isopropyl p-Hydroxybenzoate with SnCl_4·5H_2O as Catalyst
     SnCl_4·5H_2O催化合成对羟基苯甲酸异丙酯
短句来源
     Isopropyl chloroacetale was by solid superacid SO42-/Z rO2-Al2O3 as catalysts.
     本文采用固体超强酸SO42-/Z rO2-Al2O3作催化剂,合成氯乙酸异丙酯
短句来源
     Catalytic Synthesis of Isopropyl Chloroacetate with Activated Bentonite Supported SO_4~(2-)- Al_2O_3
     活性白土负载SO_4~(2-)- Al_2O_3催化合成氯乙酸异丙酯
短句来源
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  isopropyl
Synthesis, stereochemistry, and antimicrobial evaluation of t(3)-isopropyl-r(2), c(6)-di-2'-furanylpiperidin- 4-one and its deri
      
The KTN nanoparticles synthesized at 250 °C for 8 h with 1 to 4 M KOH concentration using isopropyl alcohol [(CH3)2 CHOH] as the solvent was composed of a single phase of cubic perovskite structure.
      
coli BL-21 (DE3) were induced by isopropyl-β-thiogalactopyranoside (IPTG), and then expressed.
      
coli) by isopropyl-β-D-thiogalactopyranoside (IPTG) inducement.
      
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.
      
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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。

 
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