香豆素并[4,3-d]噻吩[3,2-b:5,4-b']双吡啶衍生物的合成

以4-氯甲基香豆素为基础物质,通过与3-氰基-2-吡啶硫酮的烷基化及Thorpe-Ziegler反应,得到4-(3-氨基噻吩并[2,3-b]吡啶-2-基)香豆素,接着在对甲苯磺酸作用下,通过Picter-Spengler反应与芳香醛进行缩合,以良好收率合成了一系列香豆素并[4,3-d]噻吩[3,2-b:5,4-b']双吡啶衍生物。该反应操作简单、条件温和、收率良好。产物结构经NMR,IR,MS及元素分析数据得以证实。     

基于苯并[1,2-b:4,5-b']二呋喃共轭单元有机光伏材料的研究进展

近几年,苯并[1,2-b:4,5-b']二呋喃(benzo[1,2-b:4,5-b']difuran,BDF)由于其平面性好、电荷迁移率高、溶解性好、生产来源丰富、可生物降解等优点,得到了越来越多的关注,并被广泛应用于有机光伏分子的设计中.目前所报道的基于该共轭单元的有机光伏器件(OPV)的光电转化效率(PCE)最高已达到了9.43%,展示了巨大的应用前景.系统地介绍了BDF共轭单元的制备路线及基于BDF单元的光伏材料的最新研究进展,重点讨论了基于BDF单元给体材料结构的变化对光伏性能的影响.     

苯并[1,2-b:4,5-b']二噻吩的结构修饰及在有机光伏材料中的应用

近年来,苯并[1,2-b:4,5-b']二噻吩(benzo[1,2-b:4,5-b']dithiophene,BDT)作为构筑给体-受体结构有机半导体材料的优良电子给体,受到越来越多的重视,已广泛应用于场效应晶体管和有机光伏电池等领域。BDT类有机共轭材料具有优良的能级结构,同时又具有较高的载流子迁移率,目前报道的基于BDT的有机共轭聚合物的最高光电转换效率达到9.2%(单节光伏器件的最高效率),显示了其在有机太阳能电池领域巨大的应用前景。本文从BDT的结构修饰出发,系统地综述了基于BDT的有机光伏材料的最新研究进展,重点讨论BDT类光伏材料能级结构和聚集态形貌对光电性能的影响。     

Structure and properties of 3,6′-dimethyl-2,3-dihydrospiro-[naphtho[1,3]oxazine-2,2′-[2<Emphasis Type="Italic">H</Emphasis>]-chromen]-4-ones

New spiropyrans of the naphthoxazinone series containing structurally different hetarene moieties were synthesized. The structures of all resulting compounds were preliminary investigated by IR and ¹H NMR spectroscopy. The structures of some of the newly synthesized spiropyrans were completely characterized by X-ray diffraction. An analysis of the structures and photochromic properties of the spiropyrans led to the conclusion about the influence of the aldehyde group on the photochromic characteristics of spiropyrans.     

苯并咪唑并[2,1-b]噻唑衍生物的合成

以2-巯基咪唑类化合物为原料,室温下与含有端基炔的二芳基高碘盐反应,一步合成苯并咪唑并[2,1-b]噻唑衍生物,其结构经¹H NMR、¹³C NMR、 单晶X-衍射和HR-MS表征。在最佳反应条件［n(2-巯基苯并咪唑)/n(二芳基高碘盐)=1/1,二氯甲烷为溶剂,反应12 h］下,目标化合物的产率最高为84%。同时对该反应的机理进行了详细探讨,并采用MTT法研究了目标化合物对人肝癌细胞（HepG2）生长情况的影响。结果表明：当浓度为4 μg/mL时,化合物3b具有较强的抑制HepG2细胞增殖的活性,抑制率为52%。     

Engaging thieno[2,3-b]indole-2,3-dione for the efficient synthesis of spiro[indoline-3,4′-thiopyrano[2,3-b]indole] by reaction with N-substituted isatilidenes

A simple and efficient method, proceeding through a new mechanistic pathway, for the synthesis of spiro[indoline-3,4-thiopyrano[2.3-b]indole derivatives have been developed by exploiting the reaction of thieno[2,3-b]indole-2,3-dione with N-substituted isatilidenes. The compounds synthesized have been screened for antibacterial activity. The generality of the reaction and mechanistic rationale are presented.     

Synthesis,crystal structure,and properties of 2H-4,8-dimethylfuro[2′,3′:5,6]naphtho[1,2-b]pyran-2-one,a novel DNA intercalator

Summary The furonaphthopyrone6, a novel DNA intercalator, was synthesized in two steps (ca. 56% overall yield) starting from naphthopyrone3. The new naphthopyrone derivatives4 and6 were fully characterized and the absorption and fluorescence spectroscopic properties of6 were determined. The dark interactions of furonaphthopyrone1 and6 with DNA have been investigated by a fluorescence quenching technique and their apparentScatchard binding constants were calculated. The crystal structure of6 was determined. The planarity of6 and the geometry of the active double bond between the -pyrone and the furan moieties of6 suggest that furonaphthopyrones are efficient monofunctional DNA intercalators.

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Synthese, Kristallstruktur und Eigenschaften von 2H-4,8-Dimethylfuro[2,3:5,6]naphtho[1,2-b]pyran-2-on, einem neuen DNA-Intercalator

Zusammenfassung Der neue DNA-Intercalator6 wurde, ausgehend vom Naphthopyron3, in zwei Stufen mit einer Gesamtausbeute vonca. 56% hergestellt. Die neuen Naphthopyronderivate4 und6 wurden vollständig charakterisiert; die Absorptions- und Fluoreszenzeigenschaften von6 wurden bestimmt. Die Dunkelwechselwirkungen von1 und6 mit DNA wurden mittels einer Fluoreszenzquenchtechnik untersucht; ihreScatchard-Bindungskonstanten wurden berechnet. Die Kristallstruktur von6 wurde bestimmt. Die Planarität von6 und die Geometrie der aktiven Doppelbindung zwischen dem -Pyron- und dem Furanteil von6 lassen erwarten, daß Furonaphthopyrone effiziente monofunktionelle DNA-Intercalatoren sind.

     

A new phenanthro [2,3-b] furan from Pleione bulbocodioides

A novel phenanthro[2,3-b]furan 1,named(3-hydroxy-9-(4′-hydroxy-3′-methoxypheny1)-11-methoxy-5,6,9,10-tetrahydro- phenanthro[2,3-b]furan-10-yl)methyl acetate,and two known phenolic compounds were isolated from the tubers of Pleione bulbocodioides(Franch.)Rolfe.Their structures were elucidated by spectroscopic methods.     

Synthesis of Some New Thieno[2,3-b]pyridines,Pyrimidino[4′,5′:4,5]thieno[2,3-b]-pyridines,and 2,3-Dihydro-1,3,4-thiadiazoles

Thieno[2,3-b]pyridines were synthesized from 6-benzofuran-2-yl-4-phenyl-2-sulfanylpyridine-3-carbonitrile and each of chloro acetone, ethyl chloroacetate, ω -bromoacetophenone, and chloroacetonitrile. These compounds were conveniently converted into novel pyrido[4′,5′:4,5]thieno[3,2-d]pyrimidines. Also, 2,3-dihydro-1,3,4-thiadiazole was synthesized from hydrazonoyl halides and 2-benzofuran-2-yl-3-(phenylamino)-3-thioxopropanenitrile. The structures of the products have been elucidated by elemental analyses, spectral data studies, and alternative syntheses whenever possible. The newly synthesized compounds were tested towards microorganisms.     

新型[1,2,4]三唑[4,3-b]均四嗪类化合物的合成及其抗癌活性

以6-(3,5-二甲基吡唑-1-基)-3-肼基均四嗪和芳醛为原料,经Schiff碱缩合和环合反应合成了6个新型的6-芳基-3-(3,5-二甲基吡唑-1-基)[1,2,4]三唑[4,3-b]均四嗪类化合物(4a～4f),其结构经1HNMR,MS,IR和元素分析表征。以顺铂为对照,采用MTT法测试了体外4a～4f对人白血病细胞株,人肺癌,人乳腺癌和人子宫颈癌细胞株的抗癌活性。结果表明,4a～4f对四种癌细胞均具有较强的抑制活性。     

异色满并[4,3-b]喹啉衍生物的合成

早在1931年,Hetherington等从念珠状曲菌(Aspergillus Cand inin)和土曲菌(Asperillus tereus)等菌类中分离出带有异色满(Isochroman)环系结构的左旋抗菌素橘霉素(C itrinin),后来又相继发现诸多带有异色满环系的天然产物[1-3],新近在软木木质素中也发现了多种具有异色满结构的     

Synthesis of Benzo[4,5]furo[3,2-b]thieno[2,3-d]pyridines —Derivatives of a New Heterocyclic System

Russian Journal of Organic Chemistry - Methyl 2-(bromomethyl)thiophene-3-carboxylates reacted with substituted 2-hydroxybenzonitriles to give methyl...     

Green Aspect for Multicomponent Synthesis of Spiro[4H-indeno[1,2-b]pyridine-4,3′-[3H]indoles]

An efficient, four-component reaction of isatin, 1,3-indanedione, ethyl acetoacetate, and ammonium acetate in ethanol/water (9:1) system furnished spiro[4H-indeno[1,2-b]pyridine-4,3′-[3H]indoles] at room temperature. Merits of the method are mild reaction conditions, simple workup procedure, and ambient temperature. The synthesized compounds exhibit excellent fluorescence properties.     

Synthesis of Bisindolylindeno[1,2-b]quinoxaline and Bisindolylindeno[3,4-b]pyrazine with Poly(N,N′-dibromo-N-ethylnaphthyl-2,7-disulfonamide)

Poly(N,N′-dibromo-N-ethylnaphthyl-2,7-disulfonamide) (PBNS) as novel reagent was synthesized. Bisindolylindeno[1,2-b]quinoxaline and bisindolylindeno[3,4-b]pyrazine derivatives were synthesized in a simple and efficient method from the three-component condensation reaction of indole, indane-1,2,3-trione, and diamine aromatic compounds by PBNS under solvent-free conditions at 80 °C in good to excellent yields, short reaction times, and a simple procedure for new derivatives.

[Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications^® for the following free supplemental resource(s): Full experimental and spectral details.]     

铜催化偶联反应高效合成苯并[4,5]咪唑并[1,2-b]吡唑衍生物

建立了一种快速、高效的CuI催化N-(2-溴芳基)-5-苯基-1H-吡唑-3-胺发生分子内C—N偶联反应合成苯并[4,5]咪唑并[1,2-b]吡唑衍生物的新方法.该方法以廉价的CuI/杂环烯酮缩胺为催化剂,在二甲基亚砜(DMSO)中反应只需10min,具有反应迅速、操作简便、合成效率高等优点.     

2-Allyl-N-benzyl substituted α-naphthylamines as building blocks in heterocyclic synthesis. New and efficient syntheses of benz[e]naphtho[1,2-b]azepine and naphtho[1,2-b]azepine derivatives

A new series of 13-acetyl-7,12-dihydro-7-ethylbenz[e]naphtho[1,2-b]azepine (4a-d) and 2-aryl-4-hydroxy-2,3,4,5-tetrahydronaphtho[1,2-b]azepine derivatives (6a-d) have been synthesized from N-allyl-N-benzyl substituted α-naphthylamines (1a-d) by utilizing aromatic amino-Claisen rearrangement, intramolecular Friedel-Crafts alkylation and intramolecular dipolar 1,3-cycloaddition nitrone-olefin reactions.     

Synthesis of Green Colored Photochromic 6′-Arylamino Spiro [2H]Naphth[1,2-b]oxazines

The published route to a series of 6′-arylamino substituted photochromic spirooxazines has been investigated with improvements made to perform the synthesis in satisfactory yield. The route has been exemplified with several novel derivatives prepared (including hydroxyl functionalised). Additionally, a one-pot procedure for the conversion of suitably functionalized 1,2-naphthoquinones into the photochromic compounds is reported.     

含有异噁唑的S-三唑[3,4-b]-1,3,4-噻二嗪、咪唑[2,1-b]-1,3,4-噻二唑和咪唑[2,1-b]-1,3,4-噁二唑衍生物的合成

异噁唑衍生物作为一类重要的生物活性物质,其合成一直受到人们的关注,其中德国HMR公司开发研制的新型抗内风湿性关节炎药来氟米特(Leftunomide)已于1998年在美国率先上市,该药还具有很好的免疫调节作用．7H-均三唑[3,4-b]-1,3,4-噻二嗪、咪唑并[2,1-b]噻唑和咪唑并[2,1-b]-1,3,4-噻二唑衍生物均表现出广谱的生物活性．     

噻吩并[2,3-b]吡啶类化合物的合成及生物活性

用邻氨基噻吩腈与不同结构的二羰基化合物反应,合成了新的多取代噻吩并吡啶类衍生物4-氨基-5-取代羰基噻吩并[2,3-b]吡啶-6-酮。用元素分析、红外光谱、核磁共振氢谱和质谱等测试技术对所合成化合物的结构进行了表征。初步生物活性测试表明,该类化合物有较好的杀菌活性和一定的除草活性。     

噻吩并[2,3-b]吡啶化合物的合成及应用

噻吩并[2;3-b]吡啶;生物活性;医药;农药;合成