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Encapsulation of Cofacial Diarylacetylene Dimers Using [ 用[]包封共面二芳基乙炔二聚体
IF 0.6 4区 化学 Q4 Chemistry Pub Date : 2023-11-29 DOI: 10.3987/com-23-14921
2]Daisy Chain Rotaxane Strategy
[c2]Daisy chain rotaxanes are mechanically interlocked molecules that can cofacially assemble two π-conjugated molecules. In this study, we employed a rotaxane architecture to encapsulate diarylacetylene dimers modified with an electron-withdrawing or electron-donating substituent in two permethylated α-cyclodextrins. Solvent- and concentration-dependent 1H nuclear magnetic resonance measurements indicated the selective formation of the cofacial dimers. These dimers were mechanically interlocked by condensation with 4-{2-[2-(2-hydroxyethoxy)ethoxy]ethoxy}-3,5-dimethylaniline to obtain the corresponding [c2]daisy chain rotaxanes (up to 68% yield). UV-visible absorption and fluorescence spectra revealed that the diarylacetylene substituents modulated the optical properties of the rotaxanes.
[c2]菊花链轮烷是一种机械互锁的分子,可以将两个π共轭分子共面组装。在这项研究中,我们采用轮烷结构封装了两个过甲基化α-环糊精中由吸电子或供电子取代基修饰的二芳基乙炔二聚体。溶剂和浓度相关的1H核磁共振测量表明共面二聚体的选择性形成。这些二聚体通过与4-{2-[2-(2-羟基乙氧基)乙氧基]乙氧基}-3,5-二甲基苯胺缩合得到相应的[c2]菊花链轮烷(产率高达68%)。紫外-可见吸收光谱和荧光光谱显示,二芳基乙炔取代基调节了轮烷的光学性质。
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引用次数: 0
Evaluation of 4,4'-Diaminodiphenylmethane as a Platform for Proton, 4,4′-二氨基二苯甲烷作为质子平台的评价
IF 0.6 4区 化学 Q4 Chemistry Pub Date : 2023-11-29 DOI: 10.3987/com-23-14922
p
4,4'-Diaminodiphenylmethane (DPM)-based fluorescent probes have been reported. We designed a new fluorescent probe 1, having bis(4-methoxyphenyl)maleimide and an amino group as a fluorophore and a sensing part, respectively, in which DPM was used as a platform for sensing molecules to utilize its advantage. The fluorescence intensity of 1 increased upon adding trifluoroacetic acid in MeCN, CH2Cl2, and toluene, indicating that 1 showed as a proton sensor. The fluorescence spectral change of 1 was observed in a mixture of MeCN and various pH buffers. Moreover, 1 behaved as a metal (zinc or nickel) ion sensor with 2-formylpyridine by forming the Schiff base skeleton. The metal ion sensing behavior of 1 could be applied to an AND circuit.
基于4,4'-二氨基二苯甲烷(DPM)的荧光探针已被报道。我们设计了一种新的荧光探针1,以双(4-甲氧基苯基)马来酰亚胺和氨基分别作为荧光团和传感部分,其中DPM作为传感分子的平台,利用其优势。在MeCN、CH2Cl2和甲苯中加入三氟乙酸后,1的荧光强度增加,表明1表现为质子传感器。在MeCN和不同pH缓冲液的混合物中观察到1的荧光光谱变化。此外,1与2-甲酰基吡啶形成席夫碱骨架,作为金属(锌或镍)离子传感器。1的金属离子感应特性可应用于与电路。
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引用次数: 0
Chemical Structures 化学结构
IF 0.6 4区 化学 Q4 Chemistry Pub Date : 2023-11-24 DOI: 10.3987/com-23-14924
a
From the peels of Citrus sphaerocarpa, two new limonoids, sphaerocarpain Ⅰ and Ⅱ were isolated together with five known compounds including methyl deacetylnomilinate and ichangin. The chemical structures of the new compounds were elucidated based on chemical/physicochemical evidence. For sphaerocarpain Ⅰ and Ⅱ, the absolute configuration was established by comparison of experimental and predicted electronic circular dichroism (ECD) data. Among the isolated compounds, sphaerocarpain I, II, methyl deacetylnomilinate and ichangin showed cytotoxic activity against both human neuroblastoma cells (SH-SY5Y) and human glioblastoma cells (U-251 MG).
从柑橘皮中分离到两个新的类柠檬素,分别为sphaerocarpaⅠ和Ⅱ,并分离到5个已知化合物,包括甲基去乙酰氨基酸酯和changin。根据化学/物理化学证据对新化合物的化学结构进行了分析。对于球形carpainⅠ和Ⅱ,通过比较实验和预测的电子圆二色性(ECD)数据,建立了绝对构型。在分离的化合物中,sphaerocarpain I、II、去乙酰氨基磺酸甲酯和changin对人神经母细胞瘤细胞(SH-SY5Y)和人胶质母细胞瘤细胞(U-251 MG)均有细胞毒活性。
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引用次数: 0
Diterpene Glycosides Derived from 二萜苷源自
IF 0.6 4区 化学 Q4 Chemistry Pub Date : 2023-11-17 DOI: 10.3987/com-23-14919
Have Immunomodulatory Effects
Senescence-associated secretory phenotype (SASP) factors, involved in inflammation and tumorigenesis, can be inhibited by CD39, which degrades extracellular ATP. In this study, we analysed the chemical composition of the extracts of Aster spathulifolius, a coastal medicinal plant belonging to the Asteraceae family, and thereafter, isolated and determined the structures of the active components. We also treated THP-1 cells with the A. spathulifolius extracts and observed CD39 expression. Nine secondary metabolites, including a new diterpene glycoside 1, were isolated. Compounds 1 and 37 substantially promoted CD39 expression in THP-1 cells, and compound 3, the abundant component, showed the strongest effect in this regard, possibly degrading ATP and inhibiting the SASP.
参与炎症和肿瘤发生的衰老相关分泌表型(SASP)因子可被CD39抑制,CD39可降解细胞外ATP。本研究分析了紫菀科沿海药用植物spathulifolius提取物的化学成分,并对其有效成分进行了分离和结构鉴定。我们还用鸡血藤提取物处理THP-1细胞,观察CD39的表达。共分离到9个次生代谢物,其中包括一个新的二萜苷1。化合物1和3 - 7在THP-1细胞中显著促进CD39的表达,其中含量丰富的化合物3在这方面的作用最强,可能降解ATP,抑制SASP。
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引用次数: 0
Synthesis of Protected L,L-Cyclotryptophyltyrosine, a Key Unit of Tryptorubin A 色氨酸a关键单元保护性L-环色氨酸的合成
IF 0.6 4区 化学 Q4 Chemistry Pub Date : 2023-11-16 DOI: 10.3987/com-23-14913
Ryohei Nokura, Mayu Senda, Haruhiko Fukaya, and Yukio Hitotsuyanagi
A protected form of L,L-cyclotryptophyltyrosine, a key structure of the bicyclic hexapeptide tryptorubin A isolated from Streptomyces sp. CLI2509, was synthesized. Treatment of Boc-L-Trp-3-borono-L-Tyr(Me)-OMe, obtained from the coupling reaction of Boc-L-Trp-OH and H2N-3-iodo-L-Tyr(Me)-OMe and the subsequent borylation of iodide, with Cu(OAc)2, pyridine, and 4 Å molecular sieves in dichloromethane at 30 °C for 48 h at a concentration of 0.001 M gave protected L,L-cyclotryptophyltyrosine in 58% yield. The structure of obtained protected L,L-cyclotryptophyltyrosine was confirmed by X-ray crystallography, revealing the presence of a pyramidal indole nitrogen atom.
合成了链霉菌(Streptomyces sp. CLI2509)双环六肽色氨酸A的关键结构L-环色氨酸的保护形式。Boc-L-Trp-3-borono-L-Tyr(Me)-OMe是由Boc-L-Trp-OH和h2n -3-碘-L- tyr (Me)-OMe偶联反应得到的,随后碘化物与Cu(OAc)2、吡啶和4个Å分子筛在30°C的二氯甲烷中处理48 h,浓度为0.001 M,得到保护的L,L-环色氨酸,产率为58%。用x射线晶体学证实了得到的受保护L,L-环色氨酸的结构,发现存在一个锥体吲哚氮原子。
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引用次数: 0
Synthesis and Properties of Novel Thiophene Polycyclic Aromatic Hydrocarbons Based on Pyrene and Their Radical Cations 基于芘及其自由基阳离子的新型噻吩多环芳烃的合成与性质
IF 0.6 4区 化学 Q4 Chemistry Pub Date : 2023-11-16 DOI: 10.3987/com-23-14916
Shunjie Li and Jian Chen
Two new thiophene-modified pyrene derivatives, 4,5,9,10-tetra- (2-(5-methyl)thienyl)-2,7-di-tert-butylpyrene (1) and 4,5,9,10-tetra- (2-(5-methoxy)thienyl)-2,7-di-tert-butylpyrene (2), were designed and synthesized via FriedelCrafts alkylation and Stille coupling reactions of pyrene. The stable monoradical cations 1•+ and 2•+ based on the thiophene-modified pyrene derivatives were generated by the one-electron oxidation of the pyrene-based thiophene polycyclic aromatic groups with Ag[Al(ORF)4] (ORF = OC(CF3)3). Their structures and properties were investigated using 1H nuclear magnetic resonance spectroscopy, ultravioletvisible spectrophotometry, X-ray diffraction, density functional theory calculations, and electron paramagnetic resonance spectroscopy. The electron spin density was mainly concentrated on the pyrene ring, with a minor spillover to the peripheral thienyl moieties. Compound 1•+, which is the first reported monoradical cation of thiophene-modified pyrene, is expected to have broad application prospects in the fields of semiconductors and optoelectronic materials.
通过对芘的Friedel-Crafts烷基化和Stille偶联反应,设计并合成了两个新的噻吩修饰的芘衍生物4,5,9,10-四-(2-(5-甲基)噻基)-2,7-二叔丁基芘(1)和4,5,9,10-四-(2-(5-甲氧基)噻基)-2,7-二叔丁基芘(2)。通过与Ag[Al(ORF)4] (ORF = OC(CF3)3)的单电子氧化反应,得到了噻吩修饰芘衍生物上稳定的单自由基1•+和2•+。采用1H核磁共振波谱、紫外可见分光光度计、x射线衍射、密度泛函理论计算和电子顺磁共振波谱对其结构和性质进行了研究。电子自旋密度主要集中在芘环上,对周围的噻基部分有少量溢出。化合物1•+是首次报道的噻吩修饰芘的单自由基阳离子,有望在半导体、光电材料等领域具有广阔的应用前景。
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引用次数: 0
Diversity-Oriented, One Step Synthesis of Chromeno[2,3- 面向多样性,一步合成铬二甲基[2,3-]
IF 0.6 4区 化学 Q4 Chemistry Pub Date : 2023-11-15 DOI: 10.3987/com-23-14920
]Indoles and Thiochromeno[2,3-
A general and efficient synthesis of tetracyclic chromeno[2,3-b]indoles, thiochromeno[2,3-b]indoles and 6H-indolo[2,3-b]quinolines has been achieved through a microwave-assisted, metal free, base catalyzed domino Knoevenagel condensation, intramolecular cyclization process starting from simple indoline-2-thiones and 2-substituted benzaldehyde derivatives. This approach provides a straightforward, atom economical and concise route to access a range of otherwise not easily available heterocycles in good yields.
以简单的吲哚-2-硫酮和2-取代苯甲醛衍生物为原料,采用微波辅助、无金属、碱催化的多米诺Knoevenagel缩合、分子内环合工艺,实现了四环吲哚[2,3-b]吲哚、硫代吲哚[2,3-b]吲哚和6h -吲哚[2,3-b]喹啉的通用高效合成。这种方法提供了一种直接的、原子经济的和简洁的途径,以良好的产量获得一系列其他不容易获得的杂环化合物。
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引用次数: 0
Synthesis of Thiosemicarbazone Derivatives of 3-Formyl- 3-甲酰基-硫代氨基脲衍生物的合成
IF 0.6 4区 化学 Q4 Chemistry Pub Date : 2023-11-10 DOI: 10.3987/com-23-14870
-pyrazolylmethyleneindoles and Their Antifungal Activities
In order to discover natural-product-based antifungal candidates, a series of new thiosemicarbazone derivatives of 3-formyl-N-pyrazolylmethyleneindoles were prepared. Some derivatives showed good antifungal activities. Against Curvularia lunata, compound I-2 showed 2.2 times antifungal activity compared to the precursor indole. Against Valsa mali, compound Ⅰ-1 exhibited 1.7 times antifungal activity compared to indole.
为了发现天然产物为基础的抗真菌候选物,制备了一系列新的3-甲酰基- n -吡唑基亚甲基吲哚的硫代氨基脲衍生物。部分衍生物具有良好的抗真菌活性。化合物I-2对弯孢菌的抑菌活性是前体吲哚的2.2倍。化合物Ⅰ-1的抗真菌活性是吲哚的1.7倍。
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引用次数: 0
Synthesis of Hepta-arbutin-branched β-Cyclodextrins at Their Primary Sides 七熊果苷支链β-环糊精的合成
IF 0.6 4区 化学 Q4 Chemistry Pub Date : 2023-11-06 DOI: 10.3987/com-23-14908
Click Reaction
This paper describes the synthesis of β-cyclodextrin (CD) based arbutin (4-hydroxyphenyl β-glucopyanoside) conjugates as a model for drug delivery molecules. We introduced three variants of hepta-arbutin-branched CDs at their primary side. Of these, two incorporated oligo(ethylene)chains within their spacers to demonstrate the effect of varying spatial characteristics between the β-glucopyanoside moieties. Due to the sterically hindered position on the primary side of β-CD, we employed a highly efficient click chemistry reaction.
本文介绍了以β-环糊精(CD)为基础的熊果苷(4-羟基苯基β-葡萄糖苷)偶联物的合成,作为药物传递分子的模型。我们在其初级侧引入了三种七熊果苷支化CDs的变体。其中,两个结合的低聚(乙烯)链在其间隔中,以证明β-葡萄糖苷部分之间不同的空间特征的影响。由于β-CD在主侧的位阻位置,我们采用了高效的点击化学反应。
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引用次数: 0
Synthesis, Antioxidant Activity 合成、抗氧化活性
IF 0.6 4区 化学 Q4 Chemistry Pub Date : 2023-11-06 DOI: 10.3987/com-23-14915
a
3-[2-(5-Aryl-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl)thiazol-4-yl]-4- hydroxy-6-methyl-2H-pyran-2-ones 6a-h were synthesized via the ring closure reactions of 3-phenyl-5-aryl-4,5-dihydropyrazole-1-carbothioamides 3a-h with 3-(bromoacetyl)-4-hydroxy-6-methyl-2H-pyran-2-one 5. The new synthesized thiazolyl-pyrazolinyl-pyran-2-one compounds were evaluated for their potential antioxidant activity by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical method. The molecular docking of the synthesized compounds on DPPH oxidase protein showed a high binding affinity, confirming the experimental results recorded. The synthesized compounds deserve a consideration for further analyses regarding the control of oxidative stress and their use as possible antioxidant agents in the pharmaceutical industry.
3-[2-(5-芳基-3-苯基-4,5-二氢- 1h -吡唑-1-酰基)噻唑-4-酰基]-4-羟基-6-甲基- 2h -吡喃-2- 1- 6a-h是由3-(溴乙酰基)-4-羟基-6-甲基- 2h -吡喃-2- 1- 5与3-(溴乙酰基)闭合环反应合成的。用2,2-二苯基-1-吡啶肼(DPPH)自由基法评价了新合成的噻唑基-吡唑啉基-吡喃-2- 1化合物的潜在抗氧化活性。合成的化合物与DPPH氧化酶蛋白的分子对接显示出较高的结合亲和力,证实了实验记录的结果。合成的化合物值得进一步分析氧化应激的控制及其在制药工业中作为抗氧化剂的可能用途。
{"title":"Synthesis, Antioxidant Activity","authors":"a","doi":"10.3987/com-23-14915","DOIUrl":"https://doi.org/10.3987/com-23-14915","url":null,"abstract":"<span>3-[2-(5-Aryl-3-phenyl-4,5-dihydro-1</span><span>H</span><span>-pyrazol-1-yl)thiazol-4-yl]-4- hydroxy-6-methyl-2</span><span>H</span><span>-pyran-2-ones </span><span>6a-h</span><span> were synthesized </span><span>via</span><span> the ring closure reactions of 3-phenyl-5-aryl-4,5-dihydropyrazole-1-carbothioamides </span><span>3a-h</span><span> with 3-(bromoacetyl)-4-hydroxy-6-methyl-2</span><span>H</span><span>-pyran-2-one </span><span>5</span><span>. The new synthesized thiazolyl-pyrazolinyl-pyran-2-one compounds were evaluated for their potential antioxidant activity by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical method. The molecular docking of the synthesized compounds on DPPH oxidase protein showed a high binding affinity, confirming the experimental results recorded. The synthesized compounds deserve a consideration for further analyses regarding the control of oxidative stress and their use as possible antioxidant agents in the pharmaceutical industry.<br/></span>","PeriodicalId":13166,"journal":{"name":"Heterocycles","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Heterocycles
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