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
   phase transfer catalysts 的翻译结果: 查询用时:0.012秒
图标索引 在分类学科中查询
所有学科
化学
有机化工
更多类别查询

图标索引 历史查询
 

phase transfer catalysts
相关语句
  相转移催化剂
     Synthesis and asymmetric Induction of chiral phase transfer catalysts 1--(1S,2R)-(-)-(1-paranitrophenyl-1,3-dihydrox-yl-2-propyl) trimethylammonium iodide
     手性相转移催化剂的合成及其不对称诱导效应Ⅰ——(1S,2R)-(一)-(1-对硝基苯基-1,3-二羟基-2-丙基)三甲基碘化铵
短句来源
     Purine or pyrimidine chiral compounds had been synthesized by Michael addition between purine or pyrimidine and 5- (R) - [(1R,2S,5R) - menthyloxy] - 2(5H) - furanone by using phase transfer catalysts, which provided a new method to synthesize compounds with physiological activity.
     报道了在相转移催化剂存在下,嘌呤、嘧啶分别与5-(R)-〔(1R,2S,5R)-孟氧基〕-2(5H)呋喃酮进行迈克尔加成反应,合成了嘌呤、嘧啶类手性化合物,为研究具有生理活性的化合物提供了新的合成方法。
短句来源
     The results of the experiments show that PEG300~600 are good phase transfer catalysts.
     实验结果表明:PEG300~600是合适的固-液相转移催化剂
短句来源
     Compound (Ⅱ) and polymer_supported catalyst (Ⅲ) were used as phase transfer catalysts in the reaction of n -C 8H 17 Br with KI and KOAc showing high catalytic effect.
     (Ⅱ )、(Ⅲ )作相转移催化剂催化n -C8H17Br与KI或与KOAc反应 ,结果表明 ,(Ⅱ )、(Ⅲ )是相转移催化活性较高的催化剂 .
短句来源
     N-Alkylation of 1,2,4-triazole using phase transfer catalysts has been
     在相转移催化剂作用下,用不同的烷基化剂制备了一系列N-1取代的1,2,4-三唑,并对实验的结果进行了讨论。
短句来源
更多       
  相转移催化
     STUDY ON N-ALKYLATION OF 1,2,4-TRIAZOLE USING SOLID-LIOUID PHASE TRANSFER CATALYSTS
     固-液相转移催化1,2,4-三唑N-烷基化的研究
短句来源
     Compound (Ⅱ) and polymer_supported catalyst (Ⅲ) were used as phase transfer catalysts in the reaction of n -C 8H 17 Br with KI and KOAc showing high catalytic effect.
     (Ⅱ )、(Ⅲ )作相转移催化剂催化n -C8H17Br与KI或与KOAc反应 ,结果表明 ,(Ⅱ )、(Ⅲ )是相转移催化活性较高的催化剂 .
短句来源
     Objective:Using phase transfer catalysts(PTC),for the method of direct N-alkanisation,for synthesized N,N',N”-tribenzyl 2,4-dioxnhexahydrotriazine(DHT)and N,N',N”-tri(2,6-dinitro-4-trifluorotolyl)DHT.
     方法:在相转移催化条件下,以等体积的CH_3CN和DMF为混合溶剂,对全氢均三嗪二酮(DHT)进行N-烃基化,合成N,N’,N”-三苄基DHT和N,N’,N”三(2,6-二硝基-4-三氟甲苯基)DHT。
短句来源
     The catalytic behavior and side reaction of phase transfer catalysts tetrabutyl ammonium bromide(TBAB)and polyethylene glycol(PEG)on the synthesis of α amylcinnamaldehyde by the way of phase transfer catalysis were studied.
     研究了相转移催化法合成α戊基肉桂醛过程中相转移催化剂四丁基溴化铵(TBAB)、聚乙二醇(PEG)的催化行为和副反应。
短句来源
     Synthesis of α-Amino Acids with Carbene Method through Phase Transfer Catalysts of Phosphonium Salt
     季鏻盐相转移催化卡宾法合成α-氨基酸
短句来源
更多       
  “phase transfer catalysts”译为未确定词的双语例句
     In the presence of phase transfer catalysts, tetrapentylammonium bromide or cety] pyridinium bromide, 1,1-dioxomolybdatranic acids H[MoO2 -(OCH2CH2)3N] (A) or H[MoO2(CH(CH3)CH2)3N](B) and imidazole were first used as the catalyst in the epoxidation of cyclohexene with 30% aqueous hydrogen peroxide.
     以杂氮钼三环化合物H[MoO_2(OCH_2CH_2)_3N](A)或H{MoO_2[CH(CH_3)CH_2]_3N}(B)和咪唑为混合催化剂体系,研究了相转移条件下,环己烯与30%过氧化氢的环氧化反应。
短句来源
     The process for the preparation of 2,3-difluoro-5-chloropyridine by reaction of 2,3,5-trichloropyridine with fluoride salts in the presence of phase transfer catalysts is described.
     反应以2,3,5-三氯吡啶为原料,采用KF和CsF的混合物为氟化剂,在一定的条件下反应制备产品2,3-二氟-5-氯吡啶。
短句来源
     Methoxylation was catalyzed by quaternary ammonium salts or polythyene glycol as phase transfer catalysts, which could shorten the reaction time and increase the yield.
     以季铵盐和聚乙二醇为相转移催化剂进行甲氧基化反应,可缩短反应时间,提高收率。
短句来源
     Asymmetric induction in the alkylation reaction of 1,3 dimethyl 3 methoxyoxindole by means of nine chiral quaternary ammonium salts as phase transfer catalysts is reported.
     报道了9种手性季铵盐催化1,3-二甲基-5-甲氧基氧化吲哚的不对称碳烷基化反应。
短句来源
     Effects of catalysts,phase transfer catalysts,molar ratio of N to W,amount of catalyst were also discussed.
     探讨了不同含钨催化剂、相转移试剂、以及催化剂用量对反应的影响 ,考察了催化剂体系中N与W物质的量比与反应活性的关系。
短句来源
更多       
查询“phase transfer catalysts”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。
  phase transfer catalysts
The asymmetric synthesis of O-acetylated mandelonitrile derivative was accomplished from PhCHO, KCN, and Ac2O in a toluene--water system in the presence of transition metal complexes of Schiff"s bases as phase transfer catalysts.
      
Metal complexes as phase transfer catalysts in the synthesis of O-acetylmandelonitrile
      
The methods for synthesis and reactions of five-membered nitrogen-containing heterocycles under the conditions of phase transfer catalysis as well as the application of quaternized heterocycles as phase transfer catalysts are discussed.
      
Composition catalysts of ethylbenzene oxidation based on bis(acetylacetonato)nickel(ii) and phase transfer catalysts as ligands
      
Composition catalysts of ethylbenzene oxidation based on bis(acetylacetonato)nickel(ii) and phase transfer catalysts as ligands
      
更多          


a-Alkyl-a-amino acids were synthesized from ketones, chloroform and ammonia in the presence of potassium hydroxide, lithium chloride and phase transfer catalyst.KOH/LiCl/CPhCH2N+(C2H5)3]Cl-When phenylacetone, 3,4-dimethoxyphenylacetone, acetophenone, propiophenone and cyclohexanone were used as starting materials, both a-alkyl-a-amino acids and their amides were isolated; while acetone, methyl ethyl ketone and cyclopentanone were used, the corresponding a-alkyl-a-amino acid was the only product obtained....

a-Alkyl-a-amino acids were synthesized from ketones, chloroform and ammonia in the presence of potassium hydroxide, lithium chloride and phase transfer catalyst.KOH/LiCl/CPhCH2N+(C2H5)3]Cl-When phenylacetone, 3,4-dimethoxyphenylacetone, acetophenone, propiophenone and cyclohexanone were used as starting materials, both a-alkyl-a-amino acids and their amides were isolated; while acetone, methyl ethyl ketone and cyclopentanone were used, the corresponding a-alkyl-a-amino acid was the only product obtained.

本文研究了八种酮在相转移催化剂存在下与氯仿和氨水的作用。一步得到α-烷基-α-氨基酸和它们的酰胺。用脂肪族甲基酮和环戊酮作原料时,仅得到α-烷基-α-氨基酸一种产物。

Polyoxyethylene surfactants can be used as phase transfer catalysts in preparing dichlorocarbene. Their catalytic power varies with the number of oxyethylene units in the molecule.

聚氧乙烯类表面活性剂可作为制备二氯卡宾时的相转移催化剂,其效能与分子中氧乙烯(EO)单位的数目有关。

The a-amino acid functionalized asymmetric resins were prepared by the reaction of the anilinium resins with a-amino acids, or by the animation of chloromethylated styrene-divinylbenzene copolymers with a-amino acids in the presence of phase-transfer catalysts for chromatographic separation of racemic compound. The structures of the asymmetric resins were confirmed by infrared spectroscopic analysis.The factors affecting the properties of the asymmetric resins, such as the properties of solvents,...

The a-amino acid functionalized asymmetric resins were prepared by the reaction of the anilinium resins with a-amino acids, or by the animation of chloromethylated styrene-divinylbenzene copolymers with a-amino acids in the presence of phase-transfer catalysts for chromatographic separation of racemic compound. The structures of the asymmetric resins were confirmed by infrared spectroscopic analysis.The factors affecting the properties of the asymmetric resins, such as the properties of solvents, amount of catalysts, the temperature and time of the reaction etc., were investigated.The L-proline functionalized asymmetric resin was prepared by the two aforesaid procedures. The copper (II) complex of the L-proline functionalized asymmetric resin was utilized for ligand-exchange chromatography of the resolution of DL-proline, thus, we resolved the racemic mixture into the D-and L-proline.

为了应用配位体离子交换树脂拆分外消旋混合物,由氯甲基化苯乙烯-二乙烯苯共聚物经苯胺树脂中间体或相转移催化剂与各种光学活性的α-氨基酸进行胺缩合反应,可以得到含有α-氨基酸功能基的不对称离子交换树脂。红外光谱分析证实了这类树脂的结构。这类胺缩合反应受到各种条件和因素的影响,例如溶剂的性质,催化剂的用量,反应温度和反应时间等。采用上述两种方法合成的含L-脯氨酸功能基的不对称树脂的Cu(Ⅱ)络合物对DL-脯氨酸进行了拆分。

 
<< 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phase transfer catalysts的内容
在知识搜索中查有关phase transfer catalysts的内容
在数字搜索中查有关phase transfer catalysts的内容
在概念知识元中查有关phase transfer catalysts的内容
在学术趋势中查有关phase transfer catalysts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