磺胺类配合物的合成、表征及抑菌活性

三种磺胺类药物(磺胺间甲氧嘧啶钠、磺胺甲噁唑钠、磺胺噻唑钠)通过与醋酸盐(MAc2·nH2O:M=Co、Cu、Ni、Zn)配位反应,分别合成了一系列金属配合物,其结构经摩尔电导、质谱、红外及差热分析表征,表明为2:1型配合物.此外还研究了各金属配合物对大肠杆菌、肺炎双球菌、金黄色葡萄球菌及波氏杆菌的抑菌活性,从中筛选出抑菌性能较优的金属配合物.     

新型胆碱衍生物的合成及其体外抗疟活性

以N,N-二甲基乙醇胺和N,N-二乙基乙醇胺为初始原料,分别与不同碳链长度的溴代烷烃回流反应合成了6个新型的季铵盐型胆碱衍生物(3a~3f),其结构经UV Vis, ¹H NMR和HR-MS表征。初步抗疟活性测试结果表明：3a~3f对恶性疟原虫3D7的增殖均有一定的体外抑制活性,(1-羟基)二乙基正丁基溴化铵(3f）的活性最强［IC₅₀（68.1±6.5） nmol·L^-1］,但低于青蒿素［IC₅₀（5.7±1.54） nmol·L^-1］。     

Brazilin类似物的合成

以3-(3,4-二甲氧苯基)丙酸为原料, 经分子内傅-克反应、双羟基化、Lombardo 反应, 高价碘的氧化及类Pinacol重排等共10步反应, 完成了brazilin类似物的合成.     

1,2-二氧六环类抗疟过氧化物的合成

Synthesis of five simple analogues of peroxyplakoric acid by using Kobayashi＇s method to construct the key 1,2-dioxane core is detailed.     

钕与乌洛托品配合物的合成、表征及抗菌活性研究

报道了配合物NdI3·C6 H1 2 N4 ·HI·13H2 O的新的合成方法 ,通过元素分析、X射线粉末衍射、红外光谱、核磁共振谱、质谱、差热 热重分析 ,确定了配合物的组成和结构 ,9个水分子与Nd3+ 形成配合阳离子 [Nd(H2 O) 9] 3+ ,C6 H1 2 N4 分子以N原子与Nd3+ 直接作用 ,而 3个I- ,HI以及剩余 4个水分子与配合阳离子 [Nd(H2 O) 9] 3+ 以静电引力或氢键的形式作用。首次测定了配体碘化钕、氢碘酸乌洛托品和配合物对枯草芽孢杆菌、大肠杆菌和葡萄球菌的抗菌活性。所有试样对枯草芽孢杆菌的杀死作用较对葡萄球菌、大肠杆菌的杀死作用显著 ,且高浓度溶液(0 .0 5mol·L - 1 )比低浓度溶液 (0 .0 1mol·L - 1 )的抗菌效果好。浓度为 0 .0 5mol·L - 1时 ,由于协同性 ,配合物NdI3·C6 H1 2 N4 ·HI·13H2 O对枯草芽孢杆菌的杀死作用大于相应的配体     

酶在光学活性药物合成中的应用

作为天然的生物催化剂，酶催化化学反应具有催化效率和立体选择性高、反应条件温和的特点。酶不仅适于外消旋药物及其合成子的有效拆分，而且可用于光学活性药物手性中心的直接构建。本文介绍水解酶、氧化还原酶及其酶源在光学活性药物合成中的应用。参考文献２９篇     

氮芥苯甲酸氧化二丁基锡复合物的合成、晶体结构及其体外抗癌活性研究

Di-n-butyltin oxide reacted with p-[N,N-bis（2-chloroethyl）amino]benzoic acid to yield the compounds {{4-[（ClCH2CH2）2N]C6H4COOSnBu2}2O}2 （1） and {4-[（ClCH2CH2）2N]C6H4COO}2SnBu2 （2）, which have been characterized by IR and ^1H NMR spectra. The X-ray diffractional studies of 1 reveal the structure of the molecule to be a dimer, in which the two Bu2Sn groups were linked via two bridging oxygen atoms to form a central Bu4Sn2O2 unit. And the tin atom adopts two carbons from two n-butyl groups and three oxygen atoms from the acid and the bridging oxygen. In vitro test showed compound 1 to exhibit high cytotoxicity against P388 and HL-60 cell lines.     

二茂铁基1,4-Dihydropyridine类似物的合成

1 ,4 二氢吡啶衍生物是一类有着多种生物活性的化合物 ,具有扩张血管、抗高血压、抗动脉粥状硬化、抗肿瘤、抗糖尿病、抗衰老等作用 ,是七十年代以来相继开发的一类新型高效的钙离子拮抗剂 ,临床上用于治疗高血压、心绞痛、充血性心衰和动脉粥状硬化等心脑血管疾病及肠胃疾病、雷诺氏病 ,还可以作为辅佐药物治疗肺动脉高压和癫痫病[1 ] 。近年来 ,二茂铁衍生物在生物学、医学等方面得到了广泛的研究和应用 ,主要是由于它们的结构和性质有自身的特殊性 :二茂铁有卓越的芳香性 ,易发生取代反应 ,易进行修饰 ,并且在许多介质中有较好的稳定性 ;…     

氟康唑衍生物的设计合成及体外抗真菌活性研究

为了寻找活性更好的抗真菌化合物,基于已有的计算机辅助药物设计结果,保留氟康唑母体结构必需药效团,设计、合成了22个含对甲酚和胸腺嘧啶的氟康唑新衍生物.目标化合物的结构经1H NMR、元素分析和ESI-MS确证,初步体外抗真菌活性试验结果表明,化合物5l对7种真菌都表现出了较好的抗真菌活性(烟曲霉菌除外),化合物5a～5e,5g,5h,7a和7b对不同真菌表现出了一定的抗真菌活性.炔丙基取代氨基侧链结构的引入有利于提高该类目标化合物体外抗真菌活性,值得进一步深入研究.     

Simple Analogues of Qinghaosu (Artemisinin)

A series of 1,2,4‐trioxanes were synthesized in which the key peroxy bonds were installed through a molybdenum‐catalyzed perhydrolysis of the epoxy rings. A core structure was identified that may serve as a promising lead structure for further investigations because of its high antimalarial activity (comparable to that of artesunate and chloroquine), apparent potential for scale‐up and derivatization, and facile monitoring/tracing by using UV light.     

Preparation of [5,6]- and [6,6]-oxahomofullerene derivatives and their interconversion by Lewis acid assisted reactions of fullerene mixed peroxides

[60]Fullerene mixed peroxides C60(O)(OOtBu)4 exhibit chemo- and regioselective reactions under mild conditions. The epoxy moiety is opened by ferric chloride to form vicinal hydroxy chloride C60Cl(OH)(OOtBu)4. BF3 is also effective in opening the epoxy moiety. The O-O bond of the fullerene mixed peroxide is cleaved by aluminum chloride to form both [5,6]- and [6,6]-fullerene hemiketals (oxohomo[60]fullerenes). A Hock-type rearrangement is proposed for the formation of the hemiketals, in which a fullerene C-C bond is cleaved. Lewis acids and/or visible light can initiate isomerization of the hemiketal isomers. Single-crystal X-ray analysis and theoretical calculations confirmed the results.     

C−H Activation Enables a Concise Total Synthesis of Quinine and Analogues with Enhanced Antimalarial Activity

We report a novel approach to the classical natural product quinine that is based on two stereoselective key steps, namely a C?H activation and an aldol reaction, to unite the two heterocyclic moieties of the target molecule. This straightforward and flexible strategy enables a concise synthesis of natural (?)‐quinine, the first synthesis of unnatural (+)‐quinine, and also provides access to unprecedented C3‐aryl analogues, which were prepared in only six steps. We additionally demonstrate that these structural analogues exhibit improved antimalarial activity compared with (?)‐quinine both in vitro and in mice infected with Plasmodium berghei.     

Efficient Total Synthesis of Bongkrekic Acid and Apoptosis Inhibitory Activity of Its Analogues

Bongkrekic acid (BKA), isolated from the bacterium Burkholderia cocovenenans, is an inhibitor of adenine nucleotide translocator, which inhibits apoptosis, and is thus an important tool for the mechanistic investigation of apoptosis. An efficient total synthesis of BKA has been achieved by employing a three‐component convergent strategy based on Kocienski–Julia olefination and Suzuki–Miyaura coupling. It is noteworthy that segment B has been prepared as a new doubly functionalized coupling partner, which contributes to shortening of the number of steps. Torquoselective olefination with an ynolate has also been applied for the efficient construction of an unsaturated ester. Furthermore, it is revealed that 1‐methyl‐2‐azaadamantane N‐oxyl is an excellent reagent for final oxidation to afford BKA in high yield. Based on the total synthesis, several BKA analogues were prepared for structure–activity relationship studies, which indicated that the carboxylic acid moieties were essential for the apoptosis inhibitory activity of BKA. More easily available BKA analogues with potent apoptosis inhibitory activity were also developed.     

Synthesis and Antitumor Activity of Tanshinone Analogues

8, 8-Dimethyl-5, 6, 7,8-tetrahydrophenanthrene-3, 4-dione (3) and 8, 8-dimethyl-2- ( 1-hydroxy ethyl) -5,6, 7, 8-tetrahydrophenanthrene-3,4-dione (4), two analogues of the antitumor active tanshinone, were synthesized from anisole. The synthesized compounds 3 and 4 were shown to be highly active against leukemia P-388 cell fine as assayed by in vitro MTT method.     

Synthesis and Antioxidant Activity of Sapriparaquinone Analogues

It has been considered that the lipid peroxidition damage was involved in aging and pathological disorders. Some phases of atherosclerosis, neuronal ceroid lipofuscinosis, intermittent claudication, oxygen toxicity, and liver injury caused by orotic acid, ethanol, phosphorous or chlorinated hydrocarbons have been discussed in relation to lipid peroxidion1-3. We found that a series of unique 4,5-secoditerpenoidal compounds isolated from the medicinal plant Salvia prionitis showed various bioact…     

单螺环哌嗪季铵盐类化合物的合成及镇痛活性研究

为寻找镇痛活性更好的化合物,以前期发现的螺环哌嗪季铵盐类化合物1为先导物,设计合成了8个未见文献报道的衍生物.通过1H NMR,13C NMR和元素分析或高分辨质谱确定了化合物的结构.利用小鼠醋酸扭体模型初步评价了它们的镇痛活性,构效关系研究表明,苯环上的羟基是关键的药效团,与开链季铵盐相比,螺环季铵盐结构对活性更有利；扩大螺环和引入取代基对活性不利.