血清中Mo、Se、Mn、Cu、Zn与食管癌的关系探讨

通过对１８例食管癌患者以及８０例对照组血清中Ｍｏ、Ｓｅ、Ｍｎ、Ｃｕ、Ｚｎ的测定分析，发现食管瘤患者血硒含量明显低于对照组，二者之间有极显著性差异（Ｐ＜０．０１）。而血铜、铜／锌比值食管癌组明显高于对照组，差异有显著性（Ｐ＜０．０５）。Ｍｏ、Ｍｎ、Ｚｎ元素的含量在二组之间无显著性差异（Ｐ＞０．０５）．提示血清硒铜与食管癌有关。     

慢性支气管炎患者头发及血清微量元素的测定

用催化极谱法测定７２例慢性支气管炎患者及５０例健康者人发及血清中锌、铁、铜、锰四种微量元素的含量。结果表明，Ｚｎ、Ｆｅ元素的含量比对照组低，并表现有显著性差异（Ｐ〈０．０１），Ｃｕ、Ｍｎ元素的含量在两组之间无显著性差异（Ｐ〉０．０５）。     

中风患者血清微量元素观察

采用原子吸收分光光度法测定８７例中风患者血清中Ｃａ、Ｍｇ、Ｚｎ、Ｃｕ、Ｆｅ含量，并与正常组作对比。结果表明：中风患者Ｚｎ、Ｆｅ降低，而Ｍｇ、Ｃｕ增高，Ｚｎ／Ｃｕ比值降低（Ｐ＜０．０５～０．０１）；而两组血清Ｃａ无统计学上的差别（Ｐ＞０．５０）。     

肝素和低效阶肝素对兔动脉壁微量元素的影响

给家兔静脉注射不同效阶肝素，并用在子发射光谱仪（ＤＣＰ－ＡＥＳ）测定兔动脉壁中Ｍｏ、Ｚｎ、Ｓｅ、Ｍｎ、Ａｌ、Ｃｄ、Ｆｅ、Ｍｇ、Ｃａ、Ｐｂ、Ｎｉ、Ｔｉ、Ｃｏ、Ｋ、Ｎａ、Ｌｉ、Ｃｒ等元素含量。结果表明，与盐水组比较，商品肝素、低效阶肝素（３８ｕ／ｍｇ）使Ｍｇ、Ｋ明显高于（Ｐ〈０．０５或Ｐ〈０．０１）；低效阶肝素使Ｚｎ显著升高（Ｐ〈０．０５）；而商品肝素使Ｃｏ显著升高，Ａｌ显著降低（Ｐ〈０．０５）；两组     

乙肝患者头发微量元素分析

应用装有ＥＰＭ－８１０Ｑ电子探针扫描分析电镜，对５０例乙肝患者头发中Ｍｇ、Ａｌ、Ｃｄ、Ｃａ、Ｃｒ、Ｍｎ、Ｆｅ、Ｃｕ、Ｚｎ、Ｐｂ、Ｓｅ１１种元素含量进行分析，并与健康人头发进行比较。结果表明：乙肝组中Ｚｎ含量低于健康组，Ｃｕ、Ｃｄ、Ｆｅ含量高于健康组（Ｐ〈０．０１）。     

产妇血及其新生儿脐带血中铁、锌、铜、硒含量的研究

选取包头市区正常产妇６８名及其所生新生儿作为研究对象。分娩后抽取产妇肘静脉血及新生儿脐动脉血，分析其血清中铁、锌、铜、硒的含量．研究结果揭示：新生儿脐带血清中铁、铜、硒的含量均高于产妇血清中的含量，铁与铜有显著性差异（Ｐ＜０．０５），硒的差异不显著（Ｐ＞０．０５）；而锌则相反，新生儿脐带血清中的含量低于产妇血清中的含量，二者有高度显著性差异（Ｐ＜０．０１）。产妇血清中Ｆｅ／Ｚｎ、Ｃｕ／Ｚｎ、Ｓｅ／Ｚｎ比值分别为３．８３、２．７８、０．０８；而新生儿脐带血清中Ｆｅ／Ｚｎ、Ｃｕ／Ｚｎ、Ｓｅ／Ｚｎ比值则各为９．５６、６．８０、０．１９，进一步说明新生儿脐带血清中的锌含量降低，其它元素含量增加。     

活动性肺结核患者头发微量元素分析

通过ＥＰＭ－８１０Ｑ电子探针扫描分析电镜，对在治疗中５３例结核患者头发Ｍｇ、Ａｌ、Ｃｄ、Ｃａ、Ｃｒ、Ｍｎ、Ｆｅ、Ｃｕ、Ｚｎ、Ｐｂ、Ｓｅ１１种元素含量进行分析，并与健康人头发比较。结果表明：结核组中Ｃａ、Ｚｎ元素含量低于健康组，Ｃｕ、Ｆｅ元素含量高于健康组（Ｐ〈０．０１）。     

早孕妇女头发中四种元素含量变化及临床意义

采用日立Ｚ－８０００型偏振塞曼原子吸收分析法对５００例妊娠２～３月妇女枕后头发进行了Ｚｎ、Ｃｕ、Ｆｅ、Ｃａ四种元素含量的测定分析，结果显示与同龄组健康非孕妇女相比其Ｆｅ、Ｚｎ含量显著降低（Ｐ＜０．０１）、Ｃｕ含量稍有升高（Ｐ＜０．０５），Ｃａ含量变化不大（Ｐ＞０．０５），与用血清为样品进行的同类研究结果类似，故认为发样检测应有更多的优越性，值得普及应用；早孕妇女体内至少存在着Ｆｅ、Ｚｎ必需微量元素营养不足，应及早诊断与防治。     

微量元素与消化系癌关系的研究

对６５例消化系癌患者与８０例对照人群作了血清Ｍｏ、Ｓｅ、Ｍｎ、Ｃｕ、Ｚｎ的测定．经方差分析，四种消化系癌血清Ｓｅ含量均低于对照人群（Ｐ值均＜０．０１），而在四种消化系癌之间的区别无显著意义（Ｐ值均＞０．０５）．     

智力超常儿童发样微量元素研究

用Ｘ射线荧光法，以病例一一对照１：１配对对智力超常儿童及对照儿童的发样，进行Ｃａ、Ｍｎ、Ｃｒ、Ｆｅ、Ｎｉ、Ｃｕ、Ｚｎ、Ｍｇ、Ａｓ、Ｐｂ、Ｃｄ、Ｃｏ、Ｍｏ、Ｇｅ和Ｓｅ等十五种微量和宏量元素检测。结果显示：单因素统计处理，智力超常儿童Ｃａ、Ｚｎ和Ｎｉ等元素含量显著或非常显著地高于对照组儿童（Ｐ〈０．０５或Ｐ〈０．０１），而Ａｓ发样含量极显著低于对照组；经逐步相关回归分析，元素Ｚｎ与Ａｓ被引入方程，提示     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

Toward new camptothecins. Part 6: Synthesis of crucial ketones and their use in Friedländer reaction

In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.     

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.     

CoFe2O4自形成磁性液体场致结构化对磁化的影响

The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.     

KMnO4-mediated oxidative CN bond cleavage of tertiary amines: Synthesis of amides and sulfonamides

KMnO₄-mediated oxidative CN bond cleavage of tertiary amines producing secondary amine was introduced, which was trapped by electrophiles (acyl chloride and sulfonyl chloride) to form amides and sulfonamides. The reaction could take place at mild condition, tolerating a wide range of function groups and affording products in moderate to excellent yields.     

Highly regioselective Buchwald–Hartwig amination at C-2 of 2,4-dichloropyridine enabling a novel approach to 2,4-bisanilinopyridine (BAPyd) libraries

The highly regioselective Buchwald–Hartwig amination at C-2 of the cheap and readily accessible reagent, 2,4-dichloropyridine with a range of anilines and heterocyclic amines is described. This new methodology is robust and provides a facile access to 4-chloro-N-phenylpyridin-2-amines on 0.25 mol scale. These intermediates undergo a further Buchwald–Hartwig amination at higher temperature to enable rapid exploration of the chemical space at C-4 and to provide a library of 2,4-bisaminopyridines.     

Chemistry of heterocyclic compounds at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, over 50 years (Review)

The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.     

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.