毛细管胶束电动色谱法分离PTC氨基酸

１引言用毛细管胶束电动色谱（ＭＥＫＣ）对ＰＴＣ氨基酸分离条件进行研究，建立ＭＥＫＣ分离１７种ＰＴＣ氨基酸的方法。结果表明，在２０ｍｉｎ内１７种ＰＴＣ氨基酸得到比较满意的分离，方法回收率为９５％～１０３％，在６０μｍｏｌ／Ｌ浓度范围内均呈线性，相关系数ｒ＞０．９９２；最低检测限为０．１５－０．４０ｐｍｏｌ。用该法对灵芝菌丝中氨基酸含量进行测定并与ＨＰＬＣ法进行比较，二者无显著性差异（α＝０．０５）。２实验部分２．１仪器和试剂ＨＰ－１型高效毛细管电泳仪（中国专利：９４１１１５６４ｘ，河北大学研制），…     

高效毛细管区带电泳分离Cu(Ⅱ),Zn(Ⅱ),Pb(Ⅱ)和Al(Ⅲ)-EDTA配合物

建立了用高效毛细管区带电泳（ＣＺＥ）分离Ｃｕ（Ⅱ），Ｚｎ（Ⅱ），Ｐｂ（Ⅱ）和Ａｌ（Ⅲ）－ＥＤＴＡ配合物的方法。对影响Ｍ－ＥＤＴＡ配合物分离的主要因素，如ｐＨ值、ＥＤＴＡ用量和阳离子表面活性剂用量等进行了讨论。采用控制加权可变步长单纯形算法动态寻优对影响［Ａｌ－ＥＤＴＡ］－形成的因素进行了优化。     

高效毛细管区带电泳分离Cu(Ⅱ),Zn(Ⅱ),Pb(Ⅱ)和Al(Ⅲ)-EDTA配合物

 建立了用高效毛细管区带电泳（ＣＺＥ）分离Ｃｕ（Ⅱ），Ｚｎ（Ⅱ），Ｐｂ（Ⅱ）和Ａｌ（Ⅲ）－ＥＤＴＡ配合物的方法。对影响Ｍ－ＥＤＴＡ配合物分离的主要因素，如ｐＨ值、ＥＤＴＡ用量和阳离子表面活性剂用量等进行了讨论。采用控制加权可变步长单纯形算法动态寻优对影响［Ａｌ－ＥＤＴＡ］－形成的因素进行了优化。     

Zn（ClO4）2—DAPTU（MAPTU）—H2O三元体系30℃时的相平衡研究

测定了三元体系Ｚｎ（ＣｌＯ４）２－Ｌ－Ｈ２Ｏ（Ｌ＝ＤＡＰＴＵ，Ｎ，Ｎ＇－二安替比林硫脲，Ｌ＝ＭＡＰＴＵ，Ｎ－甲基Ｎ＇－安替比林硫脲）在３０℃时的溶解度和饱和溶液的折学率，绘制了相应的溶度图和折光率、组成图。体系的浓度曲线和折光率曲线均由３支组成，民Ｌ（Ｌ＝ＤＡＰＴＵ，ＭＡＰＴＵ）、Ｚｎ（ＣｌＯ４）２．Ｌ２．ｎＨ２Ｏ（Ｌ＝ＤＡＰＴＵ，ｎ＝２；Ｌ＝ＭＡＰＴＵ，ｎ＝０）和Ｚｎ（ＣｌＯ４）２．６Ｈ２Ｏ相应     

毛细管电动色谱带电环糊精拆分N—FMOC氨基酸对映体

将负电性磺丁基－β－环糊精手性添加剂应用于毛细管电泳氨基酸对映体的拆分研究中,对８种氨基酸对映体与９－芴甲基氧基甲酰氯（ＦＭＯＣ－Ｃｌ）生成的衍生物进行了分离,其中５种得到了基线分离。考察了背景电解质ｐＨ值及磺丁基－β－环糊精的浓度对Ｎ－ＦＭＯＣ氨基酸对映体拆分的影响。     

几种单纯形优化方法优化性能的比较研究

本文采用计算机模拟比较了常用的５种单纯形优化方法的优化性能，结果表明，改进单纯形法（ＭＳＭ）与加权形心单纯形法（ＷＣＭ）的综合优化性能最佳。用ＭＳＭ与ＷＣＭ优化高效液相色谱分离苯酚、邻甲基苯酚、对苯二酚、邻硝基苯酚与α－萘酚６组份混合样品的条件，使６个组份都获得了很好的分离。     

多目标的模式识别优化法及其在V－PTC材料设计中的应用

利用多目标的模式识别优化法进行计算机辅助Ｖ－ＰＴＣ材料设计，通过主成分分析研究了Ｖ－ＰＴＣ材料的性能与其特征参数的关系，得到了以Ｖ－ＰＴＣ材料的ρ０／ρｎ、ρｍ／ρｎ、和ρｒ为目标变量的模式识别分类图，并用来探寻具有较好性能的样品的工艺条件和配方参数。根据多目标的模式识别优化法提供的信息，设计并合成了数个优化样品。     

多目标的模式识别优化法及其在V—PTC材料设计中的应用

利用多目标的模式识别优化法进行计算机辅助Ｖ－ＰＴＣ材料设计，通过主成分分析研究了Ｖ－ＰＴＣ材料的性能与其特征参数的关系，得到了以Ｖ－ＰＴＣ材料的ρ０／ρｎ、ρｍ／ρｎ、和ρｒ为目标变量的模式识别分类图，并用来探寻具有较好性能的样品的工艺条件和配方参数。根据多目标的模式识别优化法提供的信息，设计并合成了数个优化样品。     

单纯形优化高效液相色谱分离混合酚与吡嗪烷基化产物的研究

本文详细地研究了用改进单纯形与加权形心单纯形优化高效液相色谱法分离苯酚、邻-苯二酚、对-苯二酚、邻-甲基苯酚、邻-硝基苯酚与α-萘酚混合物及吡嗪烷基化产物的条件,讨论了各种参数对优化分离的影响,提出了一个优化综合评价指标,建立了混合酚及吡嗪烷基化产物的分离方法。     

手性选择试剂环糊精与万古霉素对氨基酸对映异构体迁移顺序的影响

用毛细管电泳法分别在由两种手性选择试剂,β-环糊精(β-CD)和万古霉素(VMC)所组成的分离体系中,研究了19种氨基酸的衍生物的对映异构体的迁移顺序(EMO)。单一β-CD分离体系由含有不同浓度的β-CD的硼酸盐缓冲溶液组成;二元分离体系由不同浓度比例的β-CD和脱氧牛黄胆酸钠溶液所组成,各溶液的pH值为9.5。单一VMC分离体系含2mmol·L-1 VMC缓冲溶液(pH 7.2);二元VMC分离体系由浓度均为2mmol·L-1 VMC溶液和海美溴铵溶液组成(pH 7.2)。19种氨基酸须先与芴甲氧羰基氯反应使衍生化。结果表明:各氨基酸的对映体在相同或不同的分离体系中的EMO不一致,特别是在二元VMC体系中,氨基酸的EMO完全发生逆转。据此认为,对于目标氨基酸对映体的分离,可通过用不同的手性分离体系来实现。     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.     

Synthesis of pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles by Curtius reaction in Morita-Baylis-Hillman derivatives

Synthesis of substituted pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles from the Morita-Baylis-Hillman derivatives of acrylates via saponification followed by Curtius reaction is described.     

正丁胺对激光染料荧光谱影响的研究

用正丁胺作为碳源,采用射频辉光放电制备碳膜,选用激光染料R6G和聚乙二醇混合液作为蒸气源,采用单源热蒸发,在蒸发室与染料同时沉积得到混合膜,用拉曼光谱和红外光谱分析了碳膜的结构和键合方式,分析表明:碳膜中存在胺基团和氢原子.混合膜的荧光谱测量结果表明,认为正丁胺对染料荧光谱的影响是因为胺基和氢原子的存在.     

Cu0-catalysed 1,3-dipolar cycloadditions of α-amino acid derived N,N-cyclic azomethine imines to ynones

A series of 20 CuAIAC reactions between eight 4-acylamino substituted pyrazolidine-3-one-1-azomethine imines and four terminal ynones were performed using Cu⁰ as catalyst. The corresponding fluorescent cycloadducts were obtained in very high yields upon simple workup. Thus, Cu-metal turned out to be a better catalyst than Cu^I in terms of yield and ease of isolation. Availability of azomethine imines, mild reaction conditions, and simple workup enable a “click” access to libraries of densely substituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-ones. Reactivity of differently substituted dipoles was evaluated experimentally and by quantum chemical methods (DFT).     

Synthesis and antioxidative/anti-inflammatory activity of novel fullerene–polyamine conjugates

(E)-4-(Fullerenopyrrolidin-1-yl)-3-methylbut-2-enoic acid and its corresponding succinimidyl ester, readily obtained through Prato-type modification of C₆₀, were used for the selective N-acylation of polyamines. The thus obtained conjugates were evaluated for their antioxidative and anti-inflammatory activity and their cytotoxicity was determined. Members of this family of compounds showed interesting anti-lipid peroxidation, anti-lipoxygenase and anti-inflammatory activity and comparable cytocompatibility to spermidine.