取代查耳酮肟电化学氧化机理的研究

研究了７种取代查耳酮肟的电化学行为。用氢氧化钠底液热解石墨工作电极，取代查耳酮肟的电极过程为１ｅ氧化不可逆吸附电极过程。它们的氧化电位随取代基吸电子能力的增强而增高，并与它们相应的Ｈａｍｍｅｔｔ常数呈线性关系。取代查耳酮肟的电化学氧化机理为先失去一个电子生成ｉｍｉｎｏｘｙ自由基，然后由基对分子内烯键进行环化加成，脱氢后形成３，５－二聚代异恶唑。用控电位电解和紫外吸收光谱检测了部份电化学氧化产物，证     

环上取代基对苯乙酮和苯甲醛缩合反应的影响

苯乙酮衍生物与苯甲醛衍生物缩合制备各种查尔酮，报道了４种苯乙酮衍生物与９种苯甲醛之间相互缩合的结果，讨论了环上取代基对缩合反应的影响。苯甲醛环上取代基，除羟基外无论是吸电子基还是给电子基对缩合反应收率影响都不大；羟基处于醛基邻位和对位的苯甲醛与几种苯乙酮衍生物的缩合，多数没有得到预期的产物，或收率极低；苯乙酮环上的羟基对缩合反应影响很大，羟基超多，缩合越困难。提出了一种假设，试图解释羟基对缩合反应     

取代苯甲醛肟羧酸酯的合成及生物活性研究Ⅵ.4-二甲氨基苯甲醛肟酯的合成及生物活性

苯甲醛肟酯;取代苯甲醛肟羧酸酯的合成及生物活性研究Ⅵ.4-二甲氨基苯甲醛肟酯的合成及生物活性     

取代苯甲醛肟羧酸酯的合成及生物活性研究：I.取代苯甲醛肟二氯菊酸酯 …

探讨了α－取代苯甲醛肟合成的新方法，合成了２０种新型菊酸肟酯类化合物，并对其进行了初步生物活性测试，化合物５ａ，５ｆ具有很好的抗病毒活性。     

取代苯甲醛肟羧酸酯的合成及生物活性研究──Ⅰ.取代苯甲醛肟二氯菊酸酯的合成及生物活性

探讨了α-取代苯甲醛肟合成的新方法,合成了20种新型菊酸肟酯类化合物,并对其进行了初步生物活性测试,化合物5a,5f具有很好的抗病毒活性.     

取代苯甲醛肟羧酸酯的合成及生物活性研究 (Ⅲ)──取代苯甲醛肟四甲基环丙烷羧酸酯的合成及生物活性

肟醚(酯)类化合物具有优良的杀虫、杀螨、杀菌、除草及昆虫生长调节活性^[1].我们在前文^[2,3]基础上,合成一系列取代苯甲醛肟四甲基环丙烷羧酸酯,芳香醛肟对位为二甲氨基或二乙氨基取代的化合物(5m,5n)呈现较好的杀菌或杀虫活性.     

一锅法简便合成取代苯氧基苯乙酮

探讨了聚合物支载的铬（Ⅵ）氧化剂、过溴离子及取代苯氧基离子于单锅中以1－苯乙醇为底物,合成苯氧基苯乙酮的方法,并与分步合成法相比较。实验表明,此合成方法具有操作简便、反应条件温和、无须分离中间体、且产率较高等优点,并探索了温度、溶剂、树脂的用量等对一锅法产率的影响。     

取代苯甲醛肟羧酸酯的合成及生物活性研究(Ⅱ)——α-烷硫基苯甲醛肟羧酸酯的合成及生物活性

肟醚及肟酯衍生物是一类具有优良的杀虫、杀菌、杀螨及除草活性的化合物，有关此类化合物的研究非常活跃［１，２］．本研究组对拟除虫菊酯与芳香肟衍生物进行研究，发现菊酸肟酯类化合物具有良好的抗烟草花叶病毒和杀虫活性［３］．本文在前期研究工作的基础上，将烷硫基...     

1,4—二氢吡啶及其衍生物电化学反应机理的研究

研究了１１种１，４－二氢吡啶及其衍生物在乙腈溶剂中和铂盘电极上的电化学行为。实验结果表明：１，４－二氢吡啶及其衍生物在铂盘电极上的反应是受扩散和化学反应速率控制的两电子不可逆氧化过程，经连续两步失电子脱氢后形成相应的吡啶。用紫外吸收光谱电化学方法观测了电化学氧化过程。并与化学氧化产物的紫外光谱作了比较，证明１，４－二氢吡啶的电化学氧化产物与化学氧化产物一致。因此，电化学氧化是一种不需加化学试剂可使     

两种聚合物试剂应用于单锅合成反应中的研究-取代苯氧基苯乙酮的合成

探讨了聚合物的支载的过溴离子及取代苯氧基离子于单锅中，以苯乙酮为底物，合成取代苯氧基苯乙酮的方法，并与分步合成法相比较。实验表明，此合成方法具有操作简便，瓜条件温和，无须分离中间体，且产率较高等优点，并探索了温度、溶剂、反应时间地脂的用量等对一锅法产率的影响。     

Studies on the Electrochemical Properties of Amphiphilic Ferrocenylimines Compounds

A series of amphiphilic ferrocenylimine compounds (four amphiphilic ferrocenylimines and four corresponding palladium complexes) were synthesized and their electrochemical characters were also investigated in detail. The results revealed that the redox of ferrocene derivatives was assumed by the ferrocene group and affected by substituent groups. Some effect rules were discovered and are described here. Moreover, the dynamics parameters of the electrode process were detected by several electrochemistry techniques.     

芦丁与DNA相互作用的电化学研究

研究了芦丁与 DNA在 p H 5.72条件下相互作用的电化学行为。 DNA的存在能导致芦丁氧化还原峰电流降低 ,峰电位基本不变。通过测定 DNA引入前后的一些电化学参数 ,推测芦丁与 DNA在该条件下结合生成了一种非电活性的超分子化合物。针对该类型体系 ,推导出了一系列的方程 ,求得该超分子化合物的组成为 1∶ 1 ,结合常数 β=2 .49× 1 0 5mol- 1·L。     

Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode

The oxidative ability of donepezil, a frequently prescribed drug for the treatment of Alzheimer’s disease is reported for the first time at a gold electrode. It was oxidized by cyclic voltammetry and determined by square wave voltammetry in phosphate buffer electrolyte. Electrochemical degradation of donepezil was carried out by long term potential cycling. The identification and characterization of the major product, isolated by preparative high performance liquid chromatography, was performed by high resolution mass spectrometry and 1D and 2D nuclear magnetic resonance spectroscopy. Donepezil hydroxy derivative was identified as the major electrochemical oxidation product from donepezil.     

Electrochemical Oxidation of Catechols in the Presence of Triethyl Phosphite

The mechanism of electrochemical oxidation of catechol and some of its derivatives have been studied in the presence of triethyl phosphite as a nucleophile in aqueous solution. Voltammetric studies indicate that the quinones derived from catechol, and its derivatives, participate in Michael addition reaction with triethyl phosphite. The reaction mechanism consists of electron transfer followed by a chemical reaction which is named as an EC mechanism. The homogeneous rate constants (k_obs) were estimated by comparing the experimental cyclic voltammograms with the digitally simulated voltammograms based on EC mechanism. Also the effects of nucleophile concentration and substituted group of catechols on voltammetric behavior and the rate constants of chemical reactions were examined.     

Spectroelectrochemical Study of N‐Substituted Phenoxazines as Electrochemical Labels of Biomolecules

The electrochemical conversion of N‐substituted phenoxazines (NSP's) bearing a CH₂CH₂? X substitute (where X?OH, COOH, CH₂NH₂, CH₂SO₃H, CH₂NHCOR) was investigated using cyclic voltammetry on a bulk gold electrode and a thin‐layer spectroelectrochemical cell. The electrochemical oxidation of NSP's on the gold electrode was quasi‐reversible and proceeded in a diffusion‐controlled regime. The formal redox potential of NSP's covered the range from 0.39 to 0.45 V vs. SCE. The electrochemical oxidation of NSP's in the thin‐layer spectroelectrochemical cell produced radical cations that showed absorbance at 385, 410 and 530 nm. Electrochemical conversion fitted the general voltammetric current‐potential equation of a reversible wave, whereas electrolysis at constant potential showed a typical Cottrell behavior. Combining of NSP's with a biologically‐relevant theophylline molecule did not change electrochemical and spectral properties of the phenoxazine core. Theophylline enlarged with NSP's demonstrated electrochemical and biocatalytic behavior similar to that of NSP's. The investigated NSP's possess electrochemical and spectral properties that are useful as biomolecular labels for electroanalysis.