杂多配合物抗流感病毒活性

杂多配合物抗流感病毒活性刘杰王丽君＊＊周云山王恩波＊（东北师范大学化学系长春１３００２４；＊＊吉林医学院吉林）关键词杂多化合物，流感病毒，活性１９９７－０７－０９收稿，１９９７－０９－０１修回国家自然科学基金资助课题杂多化合物的药物化学已被广泛关注［...     

多足开链化合物与阴离子的相互作用

设计合成了６种萘取代的脲及硫脲类多足开链化合物，利用吸收光谱、荧光光谱及_１Ｈ ＮＭＲ波谱手段详细研究了该类化合物作为主体分子与不同种类的阴离子客体分子间的相互作用．实验表明，客体阴离子Ｈ_２ＰＯ_４~－及ＨＳＯ_４~－可以与三足的脲及硫脲主体分子形成主客体配合物从而诱导主体分子光物理性质发生变化，而且表现出较好的选择性．测定了主客体配合物的稳定常数和化学配位比，对三足脲和硫脲与阴离子客体的选择性和识别作用进行了比较，提出了相应主客体配合物可能的配位方式和结构形式．     

具有抗癌活性金属化合物的研究进展

综述了具有抗癌活性的铂配合物,二烃基锡衍生物,有机锗化合物,茂钛衍生物及稀土配合物近年来的研究进展,包括化合物的结构类型以及抗癌作用机制等。     

辅酶B12模型化合物的研究（Ⅵ）：轴向及平面配体对RCo（sale…

合成与表征了两类１４种烷基钴Ｓｃｌｒｉｆｆ碱配合物ＲＣｏ（ｃｈｅｌ）Ｌ（Ｒ＝ＣＨ３，Ｃ２Ｈ５，ｎ－Ｃ３Ｈ７，ｎ－Ｃ４Ｈ９，ｉ－Ｃ４Ｈ９；ｃｈｅｌ＝ｓａｌｅｎ，ＳＢ，Ｌ＝Ｐｙ，γ－ｐｉｃ，ＰＰｈ３），其中ＲＣｏ（ＳＢ）Ｌ是一类新的辅酶Ｂ１２模型化合物，五配位的Ｃ２Ｈ５Ｃｏ（ＳＢ）也是首次报道，研究了在固态和溶液中配合物的性质，并讨论了影响配合物中Ｃｏ－Ｃ键稳定性的因素。     

双(π-芳烃)铁(II)化合物的Mossbauer分析

铁的简单配合物及羰基化合物的Mossbauer研究已有报道, 对有机铁化合物的相应工作进行得较少. 本文报道一类具有夹心结构的有机铁化合物的^5^7FeMossbauer参数及其与结构的一些关系.     

磷酸三丁酯－二氧化氮配合物的结构与氧化性能研究

磷酸三丁酯－二氧化氮配合物的结构与氧化性能研究张青枝，张深松，乔仁忠，鲁富贵（河南师范大学化学系，新乡４５３００２）华国雄（河南飞龙精细化学制品有限公司，４５３００３）磷酸三丁酯（ＴＢＰ）是一种给电子化合物，可以和多种化合物形成配合物，因而被广泛地应...     

苯并咪唑双铜配合物合成表征和生物活性

本文报道三种新的Ｎ－羟乙基－Ｎ，Ｎ′，Ｎ′－三苯并咪唑甲基乙二胺双配合物合成和表征。变温磁化率分析结果表明配合和双铜离子间存在弱的反铁相互作用。ＥＳＲ结果示配合物中Ｃｕ－Ｎ键具部分共价性。对配合物儿茶酚酶活性，体外抗癌活性及农药活性测定结果表明配合物具一定催化活性和生物活性。     

九配位钬-三乙四胺六乙酸配合物K_3Ho(TTHA)·5H_2O的合成及分子结构

稀土金属离子氨基多羧酸配合物由于其配位数和结构的多样性，多年来一直是化学家们所感兴趣的内容之一犤１～３犦。例如SakagamiN．等人就曾对稀土金属离子氨基多羧酸配合物做了系统的研究犤４犦，总结出La?－EDTA形成十配位结构配合物，Ln?－EDTA（Ln?指Pr?，Nd?，Sm?，Eu?，Gd?，Dy?和Ho?等）形成九配位结构配合物，而Yb?－EDTA则形成八配位结构配合物。一般情况下，配合物的配位数和结构是由中心金属离子的离子半径，电子结构和氧化态以及配体的形状所决定，而氨基多羧酸类配体又是一大类结构各异的化合物，因此随着稀土金属离…     

有机硼化合物的分类和名称

按照狭义的分类方法,对含有硼碳键的有机硼化合物的分类进行探讨。根据结构类型,有机硼化合物可以分为烃基硼烷、烃基硼酸(酯)、烃基硼烷路易斯碱加合物和离子型有机硼化合物、有机硼杂环及其金属配合物、碳硼烷簇合物及其金属化合物等类型。对不同类型的有机硼化合物的命名进行了归纳,并给出了一些代表性化合物的英汉对照名称。     

含L—氨基酸结构的手性液晶化合物的合成及其相变行为

合成了９种具Ｌ－氨基酸衍生物结构的介晶化合物、４种氨基酸衍生物和６种介晶化合物，新化合物的化学结构通过ＩＲ、＾１ＨＮＭＲ和元素分析证实，并用偏光显微观察和ＤＳＣ分析研究了其相变行为，结果表明有８种化合物呈现液晶相变。测定了它们的比旋光度，通过Ｘ射线射研究了化合物的近晶结构，证明其具铁电性。     

A carbanion induced synthesis of highly congested pyrazole and imidazole containing heterocycles

An efficient approach to the synthesis of highly congested di, penta and hexacyclic pyrazoles as well as imidazole fragment containing novel heterocyclic molecule has been developed through a carbanion induced transformation of suitably functionalized 2H-pyran-2-ones, benzo[h]chromene and thiochromeno[4,3-b]pyrans. Due to the presence of fluorescence, we report their prime application metal sensor as off/on switching in ferric ions.     

Selective synthesis of 4,5-dihydroimidazo- and imidazo[1,5-a]quinoxalines via modified Pictet–Spengler reaction

An efficient tandem approach for the selective synthesis of 4,5-dihydroimidazo[1,5-a]quinoxalines 6a–g and imidazo[1,5-a]quinoxalines 7a–h by the reaction of 2-imidazolyl anilines 4a–c with aryl aldehydes 5a–k under mild reaction conditions is described. Introduction of electron releasing alkyl groups in substrates 4a–b was found to be instrumental for the success of the reaction.     

Understanding the Diels-Alder reactivity of 1,2-azaborine analogues

The Diels-Alder reactivity of 1,2-heteroborines (H₄C₄B(H)X, X?=?NH, PH, AsH; O, S, Se) has been computationally explored by means of Density Functional Theory (DFT) calculations. The influence of the HB?=?X fragment on the reactivity of the system has been quantitatively analyzed in detail by means of the so-called Activation Strain Model (ASM) of reactivity. It is found that the interaction between these species and the dienophile is significantly stronger than that computed for their all-carbon isoelectronic counterpart, benzene. In addition, the strain energy plays a key role in the observed reactivity trends. The role of the aromaticity strength of these heteroarenes on the reactivity is also assessed.     

Synthesis of N-substituted carbazolones from α-iodo enaminones via Pd(0)-catalyzed intramolecular coupling under microwave irradiation

A variety of N-aryl and N-alkyl carbazolones were conveniently achieved in good to high yields via Pd₂(dba)₃-mediated intramolecular coupling of N-substituted α-iodo enaminones under microwave irradiation. The Pd(0)-catalyzed cyclization was found to proceed favorably with the more electron-deficient phenyl ring during the reactions involving unsymmetrical N,N-diaryl α-iodo enaminones. This unique property enables the construction of carbazolone skeleton containing nitro substituted benzenoid ring.     

Synthesis of substituted 2,4,5,6-tetrahydrocyclopenta[c]pyrazoles and 2,4,5,6-tetrahydropyrrolo[3,4-c]pyrazoles by intramolecular nitrilimine cycloaddition

Both substituted 2,4,5,6-tetrahydrocyclopenta[c]pyrazoles and 2,4,5,6-tetrahydropyrrolo[3,4-c]pyrazoles have been synthesized by the 3+2 intramolecular dipolar cycloaddition of nitrilimines to alkynes. This cyclization has been extended to more versatile 3-bromo derivatives by the use of alkynylbromides as dipolarophiles.     

Catalyst free,visible-light promoted photoaddition reactions between C60 and N-trimethylsilylmethyl-substituted tertiary amines for synthesis of aminomethyl-1,2-dihydrofullerenes

An efficient and benign method for the preparation of aminomethyl-substituted fullerenes has been developed. The process, involving catalyst free, visible-light irradiation of 10% EtOH-toluene solutions containing fullerene C₆₀ and N-trimethylsilylmethyl-substituted amines by using a 20 W compact fluorescent lamp, leads to formation of aminomethyl-substituted fullerene adducts in a highly efficient manner. The photoaddition reaction takes place via a pathway initiated by visible light absorption by C₆₀, followed by SET from the amine to the triplet excited state of C₆₀. Ethanol-promoted desilylation of the resulting a minimum radical then generates the corresponding α-amino radical which couples with the C₆₀ radical anion to form the anion precursor of the fullerene adducts. The new approach using visible-light takes place under mild conditions and it does not require the use of photocatalysts. Thus, the method developed in this effort could broadens the range of functionalized fullerene derivatives that can be readily prepared.     

Highly efficient and stereoselective cycloaddition of nitrones to indolyl- and pyrrolylacrylates

The reactions of various nitrones with indolyl- and pyrrolylacrylates proceeds regioselectively with high diastereoselectivity in the case of aldonitrones, and represents an effective method for obtaining new indolyl- and pyrrolyl-substituted isoxazolidine carboxylates stabilized by weak (CH?O) and moderate (NH?N) strength intramolecular hydrogen bonding. The resulting cycloadducts exhibit promising in vitro anti-influenza activities.     

Transition metal-free direct amination of benzoxazoles using formamides as nitrogen sources

A transition metal-free method for the direct amination of benzoxazoles using formamides as nitrogen sources is reported, which was mediated by an inexpensive and environmentally friendly tetrabutylammonium iodide/tert-butyl hydroperoxide system and gave the 2-aminobenzoxazole derivatives with moderate to good yields.     

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.     

l-Proline-catalyzed five-component domino reaction leading to multifunctionalized 1,2,3,4-tetrahydropyridines

Multifunctionalized 1,2,3,4-tetrahydropyridines are concisely synthesized in good yields via l-proline-catalyzed or l-proline/FeCl₃-cocatalyzed one-pot multicomponent reactions (MCRs). The MCRs involve a domino hydroamination/prins reaction/Mannich-type reaction/intramolecular dehydration-cyclization process. The molecular structure of 5baa, one of multifunctionalized 1,2,3,4-tetrahydropyridines, was confirmed by single-crystal X-ray diffraction.