TLC Identification and Extraction Process of Rubiasin-1-methyl Ether from Yao Medicine Chuanlianzhu

[Objectives]To establish a thin-layer chromatography(TLC)method for the determination of rubiadin-1-methyl ether in Yao Medicine Chuanlianzhu(Damnacanthus giganteus).[Methods]A silica gel G thin-layer plate was adopted for TLC.Petroleum ether(60-90℃)-chloroform-methanol-water(7:15:3:1)was used as the developing solvent and inspected under ultraviolet lamp(365 nm).The content was determined by Inertsil ODS-3 C 18 column(4.60 mm×250 mm,5μm),mobile phase:acetonitrile-0.2%phosphoric acid gradient elution,detection wavelength 277 nm,flow rate 1.0 mL/min,column temperature 30℃,injection volume 10μL.[Results]The spots of 10 Chuanlianzhu samples from different origins showed the same color at the same position as the control,and the spots were clear and specific.The injection volume of rubiadin-1-methyl ether showed a good linear relationship in the range of 2.90-145μg(R=0.9996).The average recovery rate of rubiadin-1-methyl ether in the low,medium and high dose groups of Yao Medicine Chuanlianzhu was 98.72%,and RSD=1.78%.[Conclusions]This method can effectively identify Yao Medicine Chuanlianzhu medicinal materials and accurately determine the content of rubiadin-1-methyl ether in the medicinal materials.It provides a scientific basis for the development and utilization of Yao Medicine Chuanlianzhu medicinal resources.

5-溴-1-丙基-2,3,3-三甲基-3H-吲哚对甲苯磺酸盐的合成

本文探究合成5-溴-1-丙基-2,3,3-三甲基-3H-吲哚对甲苯磺酸盐。重点考察了反应物料比、溶剂量、反应温度和反应时间对实验结果的影响。实验结果表明:n(5-溴-2,3,3-三甲基-3H-吲哚)∶n(1-丙基对甲苯磺酸酯)=1∶15,邻二氯苯溶剂量=2V(5-溴-2,3,3-三甲基-3H-吲哚),110℃下保温反应4h,5-溴-1-丙基-2,3,3-三甲基-3H-吲哚对甲苯磺酸盐收率可达86%。

新型醛糖还原酶抑制1-乙酰基-1H-吲哚-3-乙酸酯的合成及其抑制活性

醛糖还原酶抑制剂(ARIs)抑制多元醇途径的醛糖还原酶是治疗糖尿病并发症的重要策略。以2-氯苯甲酸为起始原料,在碱性条件下经铜催化,与甘氨酸反应生成氯代邻羧基苯基甘氨酸,再与乙酸酐反应,生成N-乙酰基邻羧基苯甲酸。然后在吡啶催化下合环,生成1-乙酰基-^(1)H-吲哚-3-乙酸酯(AIA),总收率为79.0%,纯度为99.0%。通过^(1)H NMR、^(13)C NMR和MS(ESI)对其结构进行表征,并对该化合物的的醛糖还原酶抑制活性进行测定,IC 50=9.4×10^(-2)μM。

Synthesis and Crystal Structure of 3-(1-Ethyl-1H-indole-3-carbonyl)aminopropionic Acid

3-（1-Ethyl-1H-indole-3-carbonyl）aminopropionic acid has been synthesized by alkylation of 3-（1H-indole-3-carbonyl）aminopropionic acid methyl ester with bromoethane,follo-wed by saponifying and acidating,in 89.0% yield.Its crystal structure was gotten and determined by X-ray diffraction method.The crystal is of orthorhombic,space group P212121 with a = 8.9490（12）,b = 11.1010（15）,c = 13.0475（18） ,V = 1296.2（3） 3,Z = 4,Dc = 1.334 g/cm3,λ = 0.71073 ,μ（MoKα） = 0.095 mm-1,Mr = 260.29 and F（000） = 552.The structure was refined to R = 0.0306 and wR = 0.1445 for 2612 observed reflections with I 2σ（I）.In the crystal structure,molecules are linked to each other through hydrogen bonds of N（2）-H（2）···O（1） and O（3）-H（3）···O（1）,generating a three-dimensional network.

Synthesis and Crystal Structure of Methyl 3-(5-Bromo-1-ethyl-1H-indole-3-carbonyl)aminopropionate

Methyl 3-（5-bromo-l-ethyl-lH-indole-3-carbonyl）aminopropionate has been synthesized by the acylation of 5-bromo-3-trichloroacetylindole with β-alanine methyl ester, followed by alkylation with ethyl iodide, in 82.6% yield. Its crystal structure was gotten and determined by X-ray diffraction method. The crystal is of monoclinic, space group P2/c with a = 11.7927（8）, b = 14.9342（8）, c = 9.0060（5） A, β = 101.558（6）°, V = 1553.93（16） A3, Z = 4, Dc= 1.510 g/cm3, 2 = 0.71073 A,μ（MoKa） = 2.656 mm-1, Mr = 353.22 and F（000） = 720. The structure was refined to R = 0.0401 and wR = 0.0825 for 1704 observed reflections with I 〉 2σ（I）. In the crystal structure, intermolecular N（2）-H（2）...O（1） hydrogen bond and weak intermolecular bonds （C（1）-H（1）...O（1） and C（10）-H（10B）-O（2）） are formed, and π-π stacking also exists.

Synthesis of Some New Thioethers and 4-Thiazolidinones Bearing 3-(Pyridine-4'-yl)-1,2,4-Triazino[5,6-<i>b</i>]Indole Moiety as Antifungal Agents

Some new asymmetric thioethers 5 and 4-thiazolidinones 6 have been obtained from condensation of 5-formyl-3-(pyridin-4'-yl)-1,2,4-triazino[5,6-b] indole (3) with halogenated aromatic amines followed by addition of thiophenol and/or cycloaddition with thiolactic acids in nonpolar solvents. Structures of the products confirmed by elemental analysis and spectral measurements. The new systems obtained were evaluated as antifungal agents.

TsOH·H₂O-Catalyzed Friedel-Crafts of Indoles of 3-Hydroxyisobenzofuran-1(3<i>H</i>)-One with Indoles: Highly Synthesis of 3-Indolyl-Substituted Phthalides

An efficient and facile method for the synthesis of 3-indolyl-substituted phthalides by Friedel-Crafts alkylation of indoles with 3-hydroxyisobenzofuran-1(3H)-one has been developed. Using only 2 mol-% TsOH·H2O as the catalyst, various substituted indoles can react smoothly at room temperature to give the corresponding phthalides products in good to excellent yields (up to 96%).

Visible-light-enabled multicomponent synthesis of trifluoromethylated 3-indolequinoxalin-2(1H)-ones without external photocatalysis

A novel and sustainable visible-light-enabled multicomponent reaction involving quinoxalin-2(1H)-ones,indoles,and CF3SO2Na that does not require an external photocatalyst is described.This photoinduced reaction employs air as the sole oxidant,thereby providing a green and highly step-efficient approach to a series of biologically important trifluoromethylated 3-indolequinoxalin-2(1H)-ones.

An efficient synthesis of 2,2-bis(1H-indol-3-yl)-2H-acenaphthen-1-one catalyzed by recyclable solid superacid SO_4^(2-)/TiO_2 under grinding condition

An efficient synthesis of symmetrical 2,2-bis（1H-indol-3-yl）-2H-acenaphthen-1-one is achieved via a reaction of acenaphthe-nequinone and indoles catalyzed by solid superacid SO4^2-/TiO2 under solvent-free conditions at room temperature by grinding, which provides an efficient route to the synthesis of symmetrical 2,2-bis（1H-indol-3-yl）-2H-acenaphthen-1-one.This procedure offers several advantages including solvent-free conditions,excellent yields of products,simple work-up as well as reuse of catalysts which makes it a useful and attractive protocol for the synthesis of these compounds.

Indole Alkaloids from the Roots of Ervatamia hainanensis

Two new indole alkaloids, named ibogamine-18-carboxylic acid, 3, 4-didehydro-7, 8-dioxo-methyl ester 1, ibogamine-18-carboxylic acid, 16, 17-didehydro-9, 17-dihydro-9-hydroxy （2-oxopropyl）-methyl ester 2, were isolated from Ervatamia hainanensis. Their structures were elucidated on the basis of spectroscopic methods.

油莎豆生长素受体TIR1基因家族鉴定及响应盐胁迫和外源IBA的表达分析

特色油料作物油莎豆(Cyperus esculentus L.)地下块茎可积累大量油脂,且具有适应性广和抗逆性强等特点,是研究植物抗逆性和地下营养器官富集油脂的优异材料。运输抑制剂响应蛋白1(transport inhibitor response protein 1,TIR1)作为生长素受体可调控植物生长发育和响应非生物胁迫。然而,油莎豆CeTIR1的相关研究鲜有报道。本研究基于油莎豆转录组数据筛选鉴定出4个油莎豆TIR1基因(CeTIR1-1、CeTIR1-2、CeTIR1-3和CeTIR1-4),并采用RT-PCR技术克隆到4个CeTIR1成员的ORFs。生物信息学分析表明,4个CeTIR1蛋白含有典型的F-box蛋白结构域、AMN1超结构域和Transp_inhibit结构域。CeTIR1s序列长度、编码蛋白相对分子量和等电点等理化性质差异较小。4个CeTIR1分别与禾本目莎草科、木犀科及十字花科的植物来源的TIR1s在进化上亲缘关系较近。基因表达分析显示,油莎豆CeTIR1基因在不同组织表达水平差异显著,均在块茎组织中高表达,在根和叶组织中表达量较低。盐胁迫处理下油莎豆幼苗抗氧化酶活性和MDA含量升高,添加外源IBA处理后,盐胁迫油莎豆幼苗的抗氧化酶活性进一步升高且MDA含量降低。这预示着IBA可以缓解盐胁迫对油莎豆幼苗生长的不利影响。qRT-PCR结果显示,4个CeTIR1基因在盐胁迫处理幼苗中表达量增加,外源添加IBA亦可显著上调CeTIR1-2基因的表达。综合分析显示CeTIR1-2可能是参与调控油莎豆幼苗响应盐胁迫的一个重要基因。研究结果可为挖掘生长素调控油莎豆生长发育和抗逆性相关功能基因以及油莎豆逆境栽培研究提供科学依据和重要参考。

Reactivity of 3-Cyanoacetylindole Derivatives: Synthesisof 3-Hydrazonopyrazolyl and 3-Thiadiazolyl Indole Derivatives

The coupling reaction of 3-cyanoacetyl-2-methylindole 1a with the aromatic diazonium salts gave the corresponding arylhydrazones 2a-e. Compounds 2 were used for synthesis of 4-aminopyrazole-5-carbonitrile 4a-e and 5-amino-4-arylazo-3-pyrazoles 5a-e derivatives. Also, treatment of 3-cyanoacetyl-2-phenylindole 1b with phenyl isothiocyanate gave the corresponding thioacetanilide 7. The later compound 7 was utilized as the key intermediate for the synthesis of some new thiadiazole derivatives 9a-r. The structures of all new compounds were elucidated on the basis of elemental analysis and spectral data.

A New Halogenated Biindole and A New Apo-carotenone from Green Alga Chaetomorpha basiretorsa Setchell

A new halogenated biindole and a new apo-carotenone have been isolated from the ethanolic extract of the green alga Chaetomorpha basiretorsa Sethcell. On the basis of chemical and spectroscopic methods including 2D NMR technique, their structures have been elucidated as 4,4′-dichloro-5,5′-dibromo-7,7′-dimethoxy-2,2′-bi-1H-indole and 1′S*,4′R*-8-(4′-hydroxy-2′,6′,6′- trimethylcyclohex-2-enyl)-6-methyloct-3E,5E,7E-trien-2-one, respectively.

Interaction of N-(2-Methyl Thio Phenyl)-2-Hydroxy-1-Naphthaldimine with Tin Dioxide Nanoparticles: A Spectroscopic Approach

The interaction of N-(2-methyl thiophenyl)-2-hydroxy-1-naphthaldimine (NMTHN) with tin dioxide nanoparticles (SnO2 NPs) has been investigated by spectroscopic tools such as absorption and fluorescence spectroscopy. Absorption spectroscopy reveals the formation of ground state complex. Fluorescence spectroscopy has been used to study the signatures of fluorescence quenching. SnO2 NPs are found to quench the intrinsic fluorescence of NMTHN via static and dynamic quenching. The deviation from linearity in the Stern-Volmer plot has been observed.

无溶剂、无催化剂条件下5-[(3-吲哚基)-芳甲基]-2,2-二甲基-1,3-二氧六环-4,6-二酮的合成

在无溶剂和催化剂条件下 ,由芳香醛、吲哚、丙二酸亚异丙酯的三组分缩合反应 ,制备了 5 [( 3 吲哚基 ) 芳甲基 ] 2 ,2 二甲基 1,3 二氧六环 4,6 二酮 ,产率为 70 %～ 85 %,产物结构经1 HNMR 。

3-(1-吲哚基)丙酸及其衍生物的合成

介绍了3-(1-吲哚基)丙酸(3a)及其衍生物3-(5-溴-1-吲哚基)丙酸(3b)和3-(5,6-二氯-1-吲哚基)丙酸(3c)的合成方法。首先以3,3′-二硫代二丙酸二甲酯为原料与吲哚、5-溴-1-氢吲哚、5,6-二氯-1-氢吲哚的阴离子进行迈克尔加成反应,再对其碱性条件下进行水解、酸化,得到目标产物3a～3c,收率分别为49.5%,50.8%和35.1%。通过IR,1HNMR对所有化合物的结构进行了表征。

5-溴-1-甲基吲哚-2,3-二酮的合成

N-甲基-N-对溴苯基-α-甲硫基乙酰胺与高碘酸钠反应得到N-甲基-N-对溴苯基-α-甲亚磺酰基乙酰胺,收率93%,再在对甲苯磺酸作用下发生分子内的Pummerer反应,得到5-溴-1-甲基-3-甲硫基-吲哚-2-酮,收率78%,进一步与二乙酰氧基碘苯反应,得到标题化合物,收率63%,通过IR1、3CNMR1、HNMR等波谱方法证明了产物的结构。

樟脑磺酸催化的2,2-二(1H-吲哚-3-基)-2H-苊-1-酮类化合物的合成研究

双吲哚甲烷类化合物(BIAs)是一系列具有很好的生物活性的代谢产物.采用苊醌和取代吲哚为原料,合成2,2-二(1H-吲哚-3-基)-2H-苊-1-酮类化合物,对反应条件进行探索研究,得到了合成该类化合物的一种简单有效的方法.以10%的樟脑磺酸(CSA)为催化剂,无水乙醇为溶剂,在回流条件下反应30min左右,产物收率达到93%以上.产物均经过1 H NMR,13 C NMR,IR,MS和元素分析表征确认.

1-甲基吲哚-2,3-二酮合成方法的改进

N-甲基 -α-甲硫基乙酰苯胺与高碘酸钠反应得到 N-甲基 -α-(甲亚磺酰基 )乙酰苯胺 (产率 94 % ) ,再在对甲苯磺酸作用下发生分子内 Pummerer反应 ,得到 1 -甲基 -3-甲硫基吲哚 -2 -酮 (产率 61 % ) ,进一步与高碘酸钠反应 ,得到 1 -甲基吲哚 -2 ,3-二酮 ,产率 60 %。通过 IR、1 HNMR、1 3

1-苯胺基-5H-哒嗪并[4,5-b]吲哚类化合物的合成及体外抗肿瘤活性

目的设计并合成1-苯胺基-5H-哒嗪并[4,5-b]吲哚类化合物,评价其体外抗肿瘤活性。方法以5-乙酰氧基-6-溴-2-溴甲基-1-环丙基-1H-吲哚-3-羧酸乙酯为起始原料,经8～9步反应合成目标化合物;采用MTT法,测定了目标化合物对肿瘤细胞株Bel-7402和HT-1080的抑制活性。结果与结论合成了12个新化合物,其结构经1H-NMR和MS确证;多个化合物显示出良好的抗肿瘤活性,化合物10a和10d活性突出,对肿瘤细胞株Bel-7402和HT-1080的抑制活性分别是阳性对照药gefitinib的4倍和5倍,值得进一步研究。