N-(2-(腈基(4,6-二甲氧基嘧啶-2-基)甲基)苯基)酰胺类衍生物的合成及生物活性

以2-(2-硝基苯基)乙腈及4,6-二甲氧基-2-甲磺酰基嘧啶为起始原料,分别经缩合、还原及酰胺化反应合成了6个未见文献报道的N-(2-(腈基(4,6-二甲氧基嘧啶-2-基)甲基)苯基)酰胺类衍生物,其结构经1H NMR、MS和元素分析进行了确证。 在150 g/hm2的用量条件下,合成化合物未显示出除草活性。 在200 mg/L浓度下,部分化合物对黄瓜灰霉病及水稻纹枯病表现出一定的抑菌作用,其中化合物4d对水稻纹枯病的抑制率为72.33%。     

新型氯取代含杂萘联苯结构可溶性聚芳酰胺的合成、表征和性能

以类双酚单体4-(3-氯-4-羟基-苯基)-2H-二氮杂萘-1-酮(DHPZ-OC)和对氯苯腈为原料进行亲核取代反应合成二腈化合物4-[3-氯-4-(4-氰基苯氧基)苯基]-2-(4-氰基苯基)二氮杂萘-1-酮(),然后在碱性(KOH)条件下进行水解制得了一种新型的含氯取代杂萘联苯结构的芳香二酸,4-[3-氯-4-(4-羧基苯氧基)苯基]-2-(4-羧基苯基)二氮杂萘-1-酮().用新二酸与各种芳香二胺进行直接缩合聚合制得了一系列新型氯取代含杂萘联苯结构的聚芳酰胺,特性粘度可达1.23dL/g.用FTIR和¹HNMR研究了新型二酸单体及聚合物的结构.该类聚芳酰胺均可溶解于NMP,DMAc和DMSO等极性有机溶剂中,并且可浇铸成透明韧性膜,其玻璃化转变温度在291～332℃之间,10%的热失重温度在460℃以上.     

对叔丁基杯[n]芳烃酰胺衍生物的合成及其对某些金属离子的萃取性能

对叔丁基杯[n]芳烃酰胺衍生物的合成及其对某些金属离子的萃取性能;杯芳烃; 酰胺衍生物; 金属离子; 萃取; 离子识别     

杯芳烃树枝型酰胺衍生物的合成和对金属离子的识别

杯芳烃树枝型酰胺衍生物的合成和对金属离子的识别;杯芳烃;树枝型化合物;酰胺;离子识别;紫外-可见光谱     

多金属氧簇阴离子[Mo6O19]2-/PAMAM超分子化合物的制备、表征及性能

采用树状聚酰胺-胺(PAMAM)大分子化合物与同多酸阴离子[Mo6O19]2-,基于静电作用合成了同多金属氧酸盐/树型分子超分子化合物。用元素分析、FTIR、UV-V is、TG/DTA、荧光光谱等测试技术分别对样品进行了结构表征及性能测试。并利用其作为电极修饰剂,制得化学体修饰的碳糊电极(CMCPE),用循环伏安法研究了同多金属氧酸盐/树型分子超分子化合物修饰碳糊电极在1 mol/L H2SO4水溶液中的电化学行为。结果表明,该化合物具有良好的荧光性能和可逆光致变色性能;用该化合物修饰的碳糊电极与[Mo6O19][N(C4H9)2]2修饰的电极相比,在-0.2~0.2 V范围内多了1对氧化还原峰;当扫描速率低于100 mV/s时,该电极过程为表面控制过程,而当扫描速率高于100 mV/s时,电极过程变为扩散控制过程;且该电极在室温下具有很好的稳定性。     

Lipase-Catalyzed Synthesis of Carboxylic Amides: Nitrogen Nucleophiles as Acyl Acceptor

Summary.  The lipase-catalyzed aminolysis of carboxylic esters is a fairly general reaction that has been performed with a wide range of esters and amines, generally in anhydrous organic media to avoid undesirable hydrolysis of the ester. Alternatively, carboxylic amides can be synthesized by lipase mediated condensation of carboxylic acids and amines if an excess of either reactant is avoided. Chiral carboxylic esters have been resolved by lipase-catalyzed aminolysis. In the majority of these resolutions, Candida antarctica lipase B has been employed as the catalyst. A range of chiral amines has been resolved by lipase mediated acylation, using mainly the lipases from C. antarctica (B type) and Pseudomonas species. The enantiorecognition was frequently found to depend critically on the acylating agent and the reaction medium. Received December 20, 1999. Accepted January 1, 2000     

Synthesis of poly(ester amide)s with lateral groups from a bulk polycondensation reaction with formation of sodium chloride salts

Poly(ester amide)s with a regular sequence and derived from diamine, dicarboxylic acid, and glycolic acid units can be easily synthesized by using a thermal polycondensation method based on the formation of metal halide salts as a driving force. These new poly(ester amide)s have tuneable properties depending on the number of methylene groups and constitute a group of materials with potential interest as biodegradable materials in applications such as surgical sutures. The present work reveals that the proposed synthesis can also be applied when esters of L ‐lysine are used as a diamine unit since no secondary reactions such as transesterification occur under the required polymerization conditions. The possibility of linking compounds with pharmacological activity to the carboxylic acid groups of lysine extends the interest of the referred materials, for example, as drug delivery systems. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 661–667, 2008     

Crystalline structure of sequential poly(ester amide)s derived from glycolic acid, 1,6‐hexanediamine,and even aliphatic dicarboxylic acids

Basic structural data of two sequential poly(ester amide)s derived from glycolic acid, 1,6‐hexanediamine, and adipic acid or dodecanodioic acid have been determined by means of X‐ray and electron diffraction patterns from fibers and single crystals. Chain‐folded lamellar crystals were obtained by isothermal crystallization from diol or glycerine solutions, and the crystalline habit was investigated by real space electron microscopy. Polyethylene decoration techniques were applied to evaluate the regularity of the folding surfaces. Spherulites prepared from evaporation of formic acid solutions were also studied. The two sequential poly(ester amide)s crystallized according to triclinic and monoclinic unit cells, in which the a crystallographic parameter was close to the typical distance between hydrogen‐bonded chains. Projections viewed down the chain axis revealed differences in the packing mode since oblique and rectangular cells were found for the adipic acid and dodecanodioic acid derivatives, respectively. Both structures can be envisaged as a stacking of hydrogen‐bonded sheets although clear differences concerning the shift between consecutive sheets and the number of layers comprising the unit cell were found. The large unit cells that have been deduced seem to be a consequence of the different packing preferences of the diester and diamide moieties. Both polymers have a molecular conformation that deviates from the all‐trans conformation typical of aliphatic polyamides and polyesters with a large number of methylene groups. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47: 194–206, 2009     

毛细管电泳氨类手性药物对映体拆分机理研究

手性药物及其对映体在药理上可表现出较大的差异,对它们进行研究将具有重要的理论意义和实用价值[1,2].毛细管区带电泳因其分离效率高、药品和试剂用量少、方法简单而成为目前手性拆分鉴定的重要方法之一[3].