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nitrophenyl acetic acid
相关语句
  硝基苯基乙酸
     The third procedure product 3 chloro 2 nitrophenylacetic acid was obtained by hydrolysis in 82.6% yield.
     第三步通过水解反应获得 3 氯 2 硝基苯基乙酸 ,收率为 82 .6 % ;
短句来源
     Decarboxylation reaction of 3 chloro 2 nitrophenylacetic acid produced 3 chloro 2 nitrotoluene in 72.9% yield.
     3 氯 2 硝基苯基乙酸通过脱羧反应得到最终产品 3 氯 2 硝基甲苯 ,产率为 72 .9% .
短句来源
  “nitrophenyl acetic acid”译为未确定词的双语例句
     Study on a new method of synthesis of nitrophenylacetic acid
     硝基苯乙酸新合成方法的研究
短句来源
     An improvement in synthesis of nitrophenylacetic acid
     硝基苯乙酸合成方法的改进
短句来源
     o-Nitrotoluene or p-nitrotoluene can be converted to the corresponding nitrophenylacetic acid by treating the compound with alkaline salt of phenol and carbon dioxide in aprotic dipolar solvents.
     邻硝基甲苯和对硝基甲苯在碱金属酚盐的存在下,以非质子偶极溶剂为介质,能和二氧化碳作用生成相应的硝基苯乙酸。
短句来源
     The reaction occurs under very mild conditions and when the mole ratio of alkaline salt of phenol to nitrotoluene is 4:1, quantitative yield of nitrophenylacetic acid may be obtained. The carboxylation of m-nitrotoluene fails under the same conditions.
     反应条件温和。 当碱金属酚盐与硝基甲苯的摩尔配比为4:1时,可获得定量收率的硝基苯乙酸,间硝基甲苯在同样的条件下不能进行反应。
短句来源
     The binary solid complexes had been synthesized using rare earth ion with p nitrophenylacetic acid. The chemical formula of ReL 3·H 2O(Re=Eu,Sm,Tb) complexes was determined by elemental analysis,molar conductivity,and TG DTA.
     本文合成了三种稀土与对硝基苯乙酸 (HL)的二元固体配合物 ,通过元素分析等手段确定了其配合物的组成为ReL3·H2 O(Re=Eu ,Sm ,Tb)。
短句来源
  相似匹配句对
     Study on Catalytic Reduction of p - Nitrophenyl Acetic Acid with Hydrazine Hydrate
     水合肼催化还原对硝基苯乙酸的研究
短句来源
     Studies on the Synthesis of 4-Nitrophenyl Acetic Acid and 2-Nitrophenyl Acetic Acid
     对硝基苯乙酸和邻硝基苯乙酸的合成研究
短句来源
     Synthesis on acetic acid
     国内外乙酸生产状况和新合成方法
短句来源
     the fermentation of acetic acid;
     醋酸发酵;
短句来源
     Preparation of bis(p-nitrophenyl)phosphate
     双(对硝基苯)磷酸酯的制备
短句来源
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  nitrophenyl acetic acid
These three compounds are with 4-nitroaniline [(4-ABA) (C6H6N2O2)], 4-(4-nitrobenzyl) pyridine, [(4-ABA)2(C12H10N2O2)4], and (4-nitrophenyl)acetic acid, [(4-ABA) (C8H7NO4)].
      


A procedure on synthesis of nitrophenyl acetic acids with high yield of 100% has been developed catalysed by sodium methylate or ethylate partially instead of sodium phenolate at certain ratio of sodium alkoxide,nitrotoluene and sodium phenolate.

在硝基苯乙酸的合成中,采用醇钠代替部分苯酚钠,可使苯酚钠用量减少50%,产品收率仍可达100%。

A catalytic reduction of p - nitrophenyl acetic acid to p - aminophenyl acetic acid with hydrazine hydrate in the presence of iron trichloride and active carbon under reflecxing for 8 hours was studied. The yield reached 89 % under the optimum conditions.

研究了以水合肼为还原剂,FeCl_3·6H_2O/C为催化剂,对硝基苯乙酸还原为对氨基苯乙酸的反应。对反应条件的探讨表明,水合肼浓度为70%,pH值为5,回流8h,产率可达89%。

Nitration of 3-fluorophenyl acetic acid(1) was accomplished by heating it to 70 ℃ with nitro-sulfuric acid in dichloroethane for 4 h and 5-fluoro-2-nitrophenyl acetic acid(2) was obtained with 67.8% yield.The obtained compound(2) was treated with borane-tetrahydrofuran(B2H6–THF) complex under nitrogen atmosphere in excessive THF for 18 h to give a kind of dark brown oil,followed by ammonolysis with NH3.H2O in autoclave at 100 ℃ for 6 h to produce 2-(5-amino-2-nitrophenyl) ethanol(3) in 84.4% yield.Catalytic...

Nitration of 3-fluorophenyl acetic acid(1) was accomplished by heating it to 70 ℃ with nitro-sulfuric acid in dichloroethane for 4 h and 5-fluoro-2-nitrophenyl acetic acid(2) was obtained with 67.8% yield.The obtained compound(2) was treated with borane-tetrahydrofuran(B2H6–THF) complex under nitrogen atmosphere in excessive THF for 18 h to give a kind of dark brown oil,followed by ammonolysis with NH3.H2O in autoclave at 100 ℃ for 6 h to produce 2-(5-amino-2-nitrophenyl) ethanol(3) in 84.4% yield.Catalytic hydrogenation of(3) under 0.6~0.7 MPa.over 10% Pd/C in anhydrous isopropyl alcohol at 70~80 ℃ for 12 h produced 2-(2,5-diamino phenyl)ethanol(4) with 64% yield.Compared with the method reported in literature,the overall yield of target molecule(4) was increased by 11%.The chemical structure of(4) was determined by HPLC-MS and 1H-NMR.

在二氯乙烷介质中,将3-氟苯乙酸于70℃下硝化4 h得到5-氟-2-硝基苯乙酸(质量分数为67.8%)。用硼烷还原5-氟-2-硝基苯乙酸后,接着用氨水在高压釜中加热到100℃氨解,得到2-(5-氨基-2-硝基苯)乙醇(84.4%)。最后,10%Pd/C作催化剂,在无水异丙醇介质中,0.6~0.7 MPa下,于70~80℃催化氢化12 h,得到目标分子2-(2,5-二氨基苯)乙醇(64%)。与文献工艺相比,目标分子总收率提高11%。用H–NMR和MS确定了目标分子2-(2,5-二氨基苯)乙醇的化学结构。

 
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