2种新的巯基烷氧基喹啉衍生物的合成

目的合成新型的自组装单分子膜材料巯基烷氧基喹啉化合物。方法通过羟基喹啉与1,10-二溴癸烷、硫脲反应,设计合成新的巯基烷氧基喹啉衍生物,经1H NMR和MS对其结构进行表征。结果与结论合成了2种新的巯基烷氧基喹啉衍生物即4-甲基-1-(10′-巯基-癸烷基)喹啉-2-酮和1-(10′-巯基-癸烷基)喹啉-2-酮,其结构经1H NMR和MS表征。     

N-芳基(烷基)-9-苯基-吡咯并[3,4-b]喹啉-1-酮衍生物的合成

吡咯并喹啉酮结构的化合物作为一类重要杂环化合物被广泛研究,它具有一定的生物活性,它可作为乙酰胆碱酯酶抑制剂,它有抗肿瘤活性.然而该类杂环化合物传统的合成方法尚存在合成和处理方法较为复杂,或使用有毒有害的有机溶剂以及碱性催化剂等问题.本合成方法简捷,无需用到催化剂,仅用无水乙醇和冰乙酸作为溶剂,以2-氯甲基-4-苯基-3-喹啉甲酸乙酯(1)为底物与胺类化合物2a-l在EtOH-AcOH(V/V,10:1)溶剂体系中回流反应经Williamson反应形成C-N键然后经分子内环化得到一系列吡咯并[3,4-b]喹啉-1-酮衍生物,即N-芳基(烷基)-9-苯基-2,3-二氢-1H-吡咯并[3,4-b]喹啉-1-酮衍生物3al.该类化合物的结构经IR、~1H NMR、~(13)C NMR、HRMS等方法表征并得以确认.     

无溶剂条件下丙酸乙醇铵催化合成2-氨基-3-氰基-1,4,5,6-四氢吡喃并[3,2-c]喹啉-5-酮衍生物（英文）

在无溶剂条件下,采用丙酸乙醇铵催化芳醛、4-羟基喹啉-2-酮和丙二腈三组分缩合,一锅法合成了2-氨基-3-氰基-1,4,5,6-四氢吡喃并[3,2-c]喹啉-5-酮衍生物.结果表明:此法具有操作简单,反应时间短,收率高,不需使用溶剂,催化剂可重复使用的特点.     

发光材料8-羟基喹啉衍生物的合成

8-羟基喹啉铝(Alq3)是一种优良的电致发光材料,具有良好的成膜性、较高的载流子迁移率以及较好的热稳定性。研究8-羟基喹啉衍生物的合成方法对开发结构新颖的Alq3类电致发光材料具有重要意义。     

荧光光谱滴定法测定修饰环糊精与金刚烷衍生物的稳定常数

采用荧光光谱法测定修饰环糊精与金刚烷衍生物包合物的稳定常数.8-羟基喹啉修饰环糊精可发射8-羟基喹啉基团的荧光,环糊精和8-羟基喹啉基团存在自包结现象,当该修饰环糊精加入金刚烷衍生物后,金刚烷衍生物和修饰环糊精形成更稳定的包合物,可以把环糊精自包结的8-羟基喹啉基团顶出环糊精空腔,从而引起饰修环糊精荧光强度的变化.通过测定荧光强度的变化值,测得修饰环糊精与金刚烷衍生物配合物的稳定常数为lg Ks=4.015.     

2-苯基-8-羟基喹啉锂和8-羟基喹啉锂的合成及荧光性质

合成了一种新型的2-苯基-8-羟基喹啉配合物.利用元素分析、红外吸收光谱等方法对配合物的组成进行了分析,分析结果表明:2-苯基-8-羟基喹啉可与锂离子以1:1的比例形成配合物;对比研究了2-苯基-8-羟基喹啉锂和8-羟基喹啉锂的荧光性质,前者的荧光发射峰位置较后者红移了37 nm.从而说明苯环的取代增加了有机配体π-π共轭的程度,使HOMO-LUMO之间能隙变小,引起发射峰红移.     

3，8-二甲基-6-氟-2-喹啉酮酸的合成及其抑菌作用(简报)

0引言2-喹啉酮酸(犬尿酸)衍生物不仅具有抗过敏作用,还是天冬氨酸受体的特效拮抗药.喹啉酮酸生理活性的多样性引起了我们兴趣.最近,我们报道了3-甲基-2-喹啉酮酸衍生物的合成方法.希望能够筛选出具有生理活性的新的化合物或进一步修饰.作为该工作的继续,我们首次合成了3,8-二甲基-6-氟犬尿喹啉酸,并发现该化合物对一些病菌有一定的抑制作用.     

5-硝基-8-羟基喹啉合锌配合物的合成、结构及发光性质

近年来,有机电致发光材料的研究吸引了科学家的极大兴趣,8-羟基喹啉衍生物及其配合物具有较好的发光性质,许多研究人员在该方面做了研究。以5-硝基-8-羟基喹啉和Zn(NO3)2·6,H2O用常温搅拌的方式合成了锌配合物Zn(C9H5N2O3)2(CH3OH)2,对其进行了红外光谱、元素分析、X射线单晶衍射结构测定等表征。该配合物属于单斜晶系,C2/c空间群。以398,nm为激发波长,测定了配合物的荧光发射光谱,配合物在560,nm处有发射峰。与配体及其他类似配合物相比,配合物发光波长有明显的红移,能起到调控发光颜色的作用,可开发成为新的电致发光材料。     

麦克尔/环化串联反应高效合成多官能团的3,4-二氢-2H-硫吡喃[2,3-b]喹啉

为了高效合成具有喹啉并硫吡喃骨架的化合物,以新型底物2-异硫氰酸酯肉桂醛为起始原料,经过一个分子内森田-贝利斯-希尔曼反应,高收率地得到了2-巯基-3-喹啉甲醛,2-巯基-3-喹啉甲醛能与缺电子烯烃发生麦克尔/环化串联反应.结果表明,森田-贝利斯-希尔曼反应能高收率且高选择性地合成喹啉并硫吡喃衍生物.该方法具有条件温和、收率高、非对映选择性好等特点.     

几种8-羟基喹啉偶氮衍生物与金属离子显色反应的研究——比色测定铜(Ⅱ)和镍(Ⅱ)的新试剂

8—羟基喹啉及其衍生物作为分析试剂的研究已有许多工作报导。8—羟基喹啉的偶氮衍生物作为光度分析显色剂的研究也有报告发表。我们试图在8—羟基喹啉的羟基邻位上引入偶氮芳香基以提高其对金属离子显色反应的灵敏性与选择性,並希望从中找出适用于光度测定某些金属离子的新显色剂。对所合成的五种试剂与十余种金属离子的显     

表面活性氧物种对A-H(A=C,O,N)键活化机理的研究进展

表面吸附态活性氧物种如O~*、OH~*等对H_2O、CH_3OH、CH_4、NH_3所含O-H、C-H以及N-H键的活化有着十分重要的作用,其调控行为与催化剂的本身电子结构、氧物种的碱性以及A-H中H原子的酸性等有着非常密切的关系.通过表面吸附氧物种的修饰可以有效地控制A-H键的活化程度,从而达到调控反应的目的.利用40篇文献综述了近些年来理论科学工作者在该方面的研究成果,期望为实验工作提供有价值的理论指导依据.     

Activation of remote meta-C-H bonds assisted by an end-on template

Functionalization of unactivated carbon-hydrogen (C-H) single bonds is an efficient strategy for rapid generation of complex molecules from simpler ones. However, it is difficult to achieve selectivity when multiple inequivalent C-H bonds are present in the target molecule. The usual approach is to use σ-chelating directing groups, which lead to ortho-selectivity through the formation of a conformationally rigid six- or seven-membered cyclic pre-transition state. Despite the broad utility of this approach, proximity-driven reactivity prevents the activation of remote C-H bonds. Here we report a class of easily removable nitrile-containing templates that direct the activation of distal meta-C-H bonds (more than ten bonds away) of a tethered arene. We attribute this new mode of C-H activation to a weak 'end-on' interaction between the linear nitrile group and the metal centre. The 'end-on' coordination geometry relieves the strain of the cyclophane-like pre-transition state of the meta-C-H activation event. In addition, this template overrides the intrinsic electronic and steric biases as well as ortho-directing effects with two broadly useful classes of arene substrates (toluene derivatives and hydrocinnamic acids).     

8-羟基喹啉类试剂在光度分析中的应用

综述了8-羟基喹啉及其衍生物自1992年以来在光度分析中的应用。     

Understanding and exploiting C-H bond activation

The selective transformation of ubiquitous but inert C H bonds to other functional groups has far-reaching practical implications, ranging from more efficient strategies for fine chemical synthesis to the replacement of current petrochemical feedstocks by less expensive and more readily available alkanes. The past twenty years have seen many examples of C-H bond activation at transition-metal centres, often under remarkably mild conditions and with high selectivity. Although profitable practical applications have not yet been developed, our understanding of how these organometallic reactions occur, and what their inherent advantages and limitations for practical alkane conversion are, has progressed considerably. In fact, the recent development of promising catalytic systems highlights the potential of organometallic chemistry for useful C-H bond activation strategies that will ultimately allow us to exploit Earth's alkane resources more efficiently and cleanly.     

乙炔加氢反应的量子拓扑研究

基于ＵＨＦ在６－３１Ｇ基组水平上确定的ＩＲＣ途径，在此ＩＲＣ途径上选择部分构型作电荷密度拓扑分析研究。研究结果表明乙炔加氢反应是一协同的非同步反应，Ｈ－Ｈ键的生成早于Ｃ－Ｈ键的新型。但Ｃ－Ｈ键的断裂速度较快，在反应进程ｓ＝０时，已由共价相互作用变为弱的闭壳层相互作用。而Ｈ－Ｈ键在反应进程ｓ＝－０．４时，已由闭壳层相互作用变为共价相互作用。     

新型三（η^5-环戊二烯基）（μ3-烷基）镍簇合物的合成与表征

本文研究了二茂镍、1,1’-二甲基二茂镍与1,1-二苯基乙基锂的反应,分离得到两个新型的三（η5-环戊二烯基）（μ3-烷基）镍簇合物：（NiCp）3CCPh2H1和（NiCp’）3CCPh2H2其中Cp’=C5H4CH3）.这两个三核镍簇合物的结构经元素分析、EI-MS、1HNMR和13CNMR等光谱方法进行了表征和确定.1,1-二苯基乙基镍中间体的C—H键活化及其迁移反应认为是形成三核镍簇合物形成的重要步骤.此外,甲基引入到环戊二烯基环上可以显著地提高三核镍簇合物的生成产率.     

Catalytic functionalization of unactivated primary C-H bonds directed by an alcohol

New synthetic methods for the catalytic functionalization of C-H bonds have the potential to revolutionize the synthesis of complex molecules. However, the realization of this synthetic potential requires the ability to functionalize selectively one C-H bond in a compound containing many such bonds and an array of functional groups. The site-selective functionalization of aliphatic C-H bonds is one of the greatest challenges that must be met for C-H bond functionalization to be used widely in complex-molecule synthesis, and processes catalysed by transition-metals provide the opportunity to control selectivity. Current methods for catalytic, aliphatic C-H bond functionalization typically rely on the presence of one inherently reactive C-H bond, or on installation and subsequent removal of directing groups that are not components of the desired molecule. To overcome these limitations, we sought catalysts and reagents that would facilitate aliphatic C-H bond functionalization at a single site, with chemoselectivity derived from the properties of the catalyst and site-selectivity directed by common functional groups contained in both the reactant and the desired product. Here we show that the combination of an iridium-phenanthroline catalyst and a dihydridosilane reagent leads to the site-selective γ-functionalization of primary C-H bonds controlled by a hydroxyl group, the most common functional group in natural products. The scope of the reaction encompasses alcohols and ketones bearing many substitution patterns and auxiliary functional groups; this broad scope suggests that this methodology will be suitable for the site-selective and diastereoselective functionalization of complex natural products.     

CH4…PH3体系分子间相互作用的从头算研究

采用MPS方法，在不同基组水平上（3－21G、6－31G（d）、6－311＋G（2d,2p）水平上，对CH4…PH3体系进行了从头算研究，给出了复合物的最优构型及其结合能（BDE），结果表明该体系有两种稳定构象，通过对这两种构象稳定性的分析，揭示了空间位阻对橡稳定性的影响，经计算在MP2／6－311＋G（2d,2p）水平上，CH4…PH3体系的结合能为1．9kJ/mol，考虑基集超位误差校正（BSSE）后，结合能为1．0kJ/mol，将此结果与其它氢键体系作了比较，并分析了产生这种结果的原因。     

碳基烧蚀材料高温氧化反应机理的分子动力学研究

本文采用基于紧束缚密度泛函理论的分子动力学,研究高温下碳基烧蚀材料三种模型(无缺陷、原子缺陷以及孔洞缺陷)的氧化反应机制．研究发现高温下的反应产物主要是CO和CO₂.CO的产生过程主要源于环氧基团中C-C键的裂解,而CO₂的形成则较为复杂,主要源于小分子团簇(C₂O₂、C₃O₁、C₄O₁)的裂解．C-C键裂解是石墨氧化反应的主要途径,C-O键形成是CO和CO₂生成速率的控制因素．此外,体系的温度、缺陷以及孔洞对石墨的氧化反应机制有重要的影响．通过分析氧化反应速率,计算得到三种模型氧化反应的活化能分别为7.56、2.4和1.6kcal/mol．缺陷越明显活化能越低,则氧化反应速率较高,无缺陷的模型由于活化能最高,其氧化反应速率最低．     

Structure and reactivity of a mononuclear non-haem iron(III)-peroxo complex

Oxygen-containing mononuclear iron species--iron(III)-peroxo, iron(III)-hydroperoxo and iron(IV)-oxo--are key intermediates in the catalytic activation of dioxygen by iron-containing metalloenzymes. It has been difficult to generate synthetic analogues of these three active iron-oxygen species in identical host complexes, which is necessary to elucidate changes to the structure of the iron centre during catalysis and the factors that control their chemical reactivities with substrates. Here we report the high-resolution crystal structure of a mononuclear non-haem side-on iron(III)-peroxo complex, [Fe(III)(TMC)(OO)](+). We also report a series of chemical reactions in which this iron(III)-peroxo complex is cleanly converted to the iron(III)-hydroperoxo complex, [Fe(III)(TMC)(OOH)](2+), via a short-lived intermediate on protonation. This iron(III)-hydroperoxo complex then cleanly converts to the ferryl complex, [Fe(IV)(TMC)(O)](2+), via homolytic O-O bond cleavage of the iron(III)-hydroperoxo species. All three of these iron species--the three most biologically relevant iron-oxygen intermediates--have been spectroscopically characterized; we note that they have been obtained using a simple macrocyclic ligand. We have performed relative reactivity studies on these three iron species which reveal that the iron(III)-hydroperoxo complex is the most reactive of the three in the deformylation of aldehydes and that it has a similar reactivity to the iron(IV)-oxo complex in C-H bond activation of alkylaromatics. These reactivity results demonstrate that iron(III)-hydroperoxo species are viable oxidants in both nucleophilic and electrophilic reactions by iron-containing enzymes.