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噻吩衍生物     
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  thiophene derivatives
     α-Carbonyl-N,N-disubstitued formamides (5a~5f) were synthesized from compounds 2a~2f under the condition of pH=8~9. Furthermore, compounds 2α-2f and compounds 3a~3f reacted with trimethyl phosphite in xylene to afford tetrasubstituted vinylphosphonates 6a~6f, 7a~7f, 8a~8f and thiophene derivatives 9a~9f, respectively.
     2在碱性条件下得到N,N-二取代-α-羰基甲酰取代胺(5a~5f)。 化合物2a~2f及化合物3a~3f分别与亚磷酸三甲酯在高温下反应得到了烯烃膦酸酯6a~6f、7a~7f、8a~8f和噻吩衍生物9a~9f。
短句来源
     Thiophene derivatives substituted at β position exhibit special activities, they are mainly used for synthesizing pharmaceuticals and pesticides.
     β-噻吩衍生物有特殊的活性,主要用于合成医药和农药。
短句来源
     Thiophene derivatives substituted at a position are used in synthesis of pharmaceuticals, pesticides, dyestuffs, chemical reagents and auxilia- ries for high polymers. The important derivatives include thiophene-α- acetic acid, α-chloromethylthiophene, α-acetylthiophene and thiophene- α-formaldehyde. Thiophene-α-acetic acid has a largest consumption a- mount in thiophene derivaties with a margin of about 1000t/a.
     α-噻吩衍生物广泛应用于合成医药、农药、染料、化学试剂和高分子助剂等,重要的衍生物有噻吩-α-乙酸、α-氯甲基噻吩、α-乙酰噻吩和噻吩-α-甲醛,噻吩-α-乙酸是目前用量最大的噻吩衍生物,全球用量在1000t/a左右。
短句来源
     A Theoretical Study on Effect of Electronic and Steric Structures of Thiophene Derivatives for Their Deep Desulfurization
     深度脱硫噻吩衍生物的电子和空间性质理论研究(英文)
短句来源
     However,with the increase of the number of the branched chain on the thiophene ring,the di-and tri-alkylation capability of thiophene derivatives decreased a lot because of the thermodynamics and steric effects,and their primary products are restricted to the mono-alkylated products.
     但噻吩衍生物与己烯进行二次以至多次烷基化反应的能力则随着噻吩环上支链的增加逐渐减弱,原因可能来自噻吩衍生物继续进行烷基化反应的热力学条件不利,以及环上已有侧链的空间位阻效应.
短句来源
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  thiophene derivative
     Study on Molecular Assembly and Photoelectric Function of Thiophene Derivative
     以噻吩衍生物为底物的分子组装和光电功能研究
短句来源
     The results show that 2 morpholino 3 phenylquinoxaline (3), 5 morpholino 6 phenyl 1,2,4 triazin 3 one (4), thiophene derivative (5) and 2,2,4,5 tetrasubstituted 1,3 dithioles (6) were prepared.
     结果表明它们分别生成了 2 吗啉基 3 苯基喹喔啉、5 吗啉基 6 苯基 1 ,2 ,4 三嗪 3 酮、噻吩衍生物和 2 ,2 ,4,5 四取代 1 ,3 二硫杂环戊烯 4的衍生物等杂环化合物 .
短句来源
  thiophene derivation
     The Application Study of Thiophene Derivation on Clinic
     噻吩衍生物在临床上的应用研究
短句来源
  thiophen derivatives
     DFT study on electronic structures of thiophen derivatives
     噻吩衍生物电子结构的DFT研究
短句来源
     Geometric structures of α-substituted thiophen derivatives were optimized with B3LYP method at 6-31G~* level. Their frontier molecular orbital energy levels and electronic spectra were obtained with TD-DFT method.
     采用B3LYP方法在631G*水平上优化了12种α位取代噻吩衍生物的几何构型,采用TDDFT方法计算了它们的前线轨道能级和电子光谱.
短句来源

 

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      thiophene derivatives
    Degradation of thiophene-2-carboxylate, furan-2-carboxylate, pyrrole-2-carboxylate and other thiophene derivatives by the bacter
          
    A bacterium of the genus Vibrio, capable of degrading thiophene derivatives, was isolated from enrichment cultures inoculated with oil-contaminated estuarine mud.
          
    Of the thiophene derivatives tested, only thiophene-2-carboxylate (T2C), thiophene-2-acetate and thiophene-2-carbonyl chloride supported growth, but a total of seven were significantly oxidised by resting cells.
          
    The fungus metabolized a series of sulfur compounds - 25 structurally related thiophene derivatives - via several different pathways.
          
    Comparative study of the electrochemical response of poly (alkyl thiophene) derivatives deposited on platinum and titanium elect
          
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      thiophene derivative
    The transformation of the 2-amino-5-phenylazo-thiophene derivative9 by potassium hydroxide yields the substituted 3-mercapto-pyridazin-6(1H)one10, with sodium ethoxide the 5-phenylhydrazono-2-oxo-thiolen-3-carbonitrile11 is formed.
          
    In the course of an attempted elimination reaction starting from an isothiochromane derivative substituted with an amino-alcohol moiety, a benzo[c]thiophene derivative formed via a rearrangement reaction was isolated unexpectedly.
          
    Alpha-terthienyl, a phototoxic thiophene derivative from species in the Asteraceae reduced feeding and growth of the phytophagous lepidopteran,Euxoa messoria, when incorporated into artificial diets at a concentration of 100 ppm.
          
    For a thiophene derivative the latter direction of the reaction is observed to a substantially smaller degree.
          
    Vibrational spectra and structure of thiophene derivative sulfones
          
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