- A sterically hindered optically active pentamethine dye
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Bis[1,3-dimethyl-3,8-(trimethylen)-indolinyl]pentamethinium iodide (5) was synthesized by coupling rac 4a-methyl-2,3,4,4a-tetrahydro-1H-carbazole (3) with 1,1,3,3-tetraethoxypropane. The configuration of the dye is 2Z,8E,9E,10E,9′E,8′Z as shown by 1H NMR spectroscopy. Starting with the enantiomerically pure carbazole (95% e.e.) the optically active pentamethine 5a was obtained in 84% optical yield. The CD absorption of 5a at 653 nm indicates a significant helical distortion of the chromophore.
- Nuding, Guido,Zimmermann, Edgar,Buss, Volker
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Read Online
- An indoxyl-based strategy for the synthesis of indolines and indolenines
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An indoxyl-based strategy for the synthesis of indolines and indolenines via unprecedented aza-pinacol and aza-semipinacol rearrangements was developed. This method provides direct access to the core structures of several classes of indole alkaloids. The synthetic utility was demonstrated by the divergent synthesis of an array of functionalized polycyclic structures from a common intermediate and the formal total synthesis of the indoline natural product minfiensine. The reversed reactivity of indoxyl as a building block compared to that of indole offers a conceptually distinct disconnection strategy for indoline- and indolenine-containing heterocycles and natural products. Making other arrangements: The chemical synthesis of a diverse range of functionalized indolines/indolenines and the formal total synthesis of the indoline natural product minfiensine were achieved by using an indoxyl-based strategy that proceeds via unprecedented aza-pinacol rearrangements. This method provides direct access to the core structures of several classes of indole alkaloids by employing conceptually distinct bond disconnections.
- Yu, Yuanyuan,Li, Guang,Jiang, Long,Zu, Liansuo
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Read Online
- Potential inhibitors of tyrosine hydroxylase and dopamine-β-hydroxylase
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A series of methyl-substituted 1,2,3,4-tetrahydrocarbazoles was synthesized and screened for in vitro activity against tyrosine hydroxylase and dopamine-β-hydroxylase. The most potent compounds were evaluated for inhibition of norepinephrine biosynthesis in rats. The results indicated no significant decrease in norepinephrine levels at three dosage levels.
- Scott,Alt,Kemp,Hayes,Telang
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Read Online
- Organic light-emitting diode having alleviated luminance reduction in low dynamic range
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The present disclosure relates to an organic light-emitting diode which can operate at a low voltage with high efficiency and exhibits the effect of having an alleviated luminance reduction rate in a low dynamic range. More particularly, the organic light-emitting diode comprises: a first electrode; a second electrode facing the first electrode; and a light-emitting layer and a charge balance control layer arranged sequentially between the first and the second electrode, wherein the light-emitting layer includes at least one of amine derivative compounds represented by the following Chemical Formula A and the charge balance control layer includes at least one of anthracene derivative compounds represented by the following Chemical Formula B or C. The structures of Chemical Formulas A, B, and C are as defined in the specification.
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Page/Page column 69-70
(2022/02/22)
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- An electroluminescen compound and an electroluminescent device comprising the same
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The present invention relates to an organic light-emitting compound represented by chemical formula 1. An organic electroluminescent device comprising the organic light-emitting compound in the present invention has excellent power efficiency, light-emitting efficiency, and long life cycle because the present invention can be operated by a lower driving-voltage in comparison to a device comprising conventional phosphorescent host materials. [Chemical formula 1].
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Paragraph 0406-0410
(2021/07/13)
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- Novel boron compounds and Organic light emitting diode including the same
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The present invention relates to a boron compound usable in an organic light-emitting device, and an organic light-emitting device comprising the same and, more particularly, to a boron compound represented by any one of chemical formula A to chemical formula D and an organic light-emitting device comprising the same. The chemical formula A to chemical formula D are the same as described in the detailed description of the invention. When the novel boron compound is used as a dopant material in an organic light-emitting device, the organic light-emitting device exhibits longer life characteristics compared to the prior art.
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Paragraph 0527; 0532-0535
(2021/02/02)
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- Novel boron compounds and Organic light emitting diode including the same
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The present invention relates to a boron compound that can be used in an organic light-emitting element, and an organic light-emitting element comprising same, and more specifically, to a boron compound represented by [chemical formula A] and an organic l
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Paragraph 0266-0270
(2021/04/20)
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- Boron compound and organic light emitting diode including the same
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Disclosed herein are a boron compound available for an organic light-emitting diode and an organic light-emitting diode including same. More particularly, a boron compound represented by Chemical Formula A and an organic light-emitting diode including sam
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Paragraph 0231-0232
(2021/10/15)
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- An electroluminescent compound and an electroluminescent device comprising the same
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The present invention relates to an organic light-emitting compound represented by [Chemical formula 1]. An organic electroluminescent device comprising the organic light-emitting compound in the present invention has excellent power efficiency, light-emitting efficiency, and long life cycle because the present invention can be operated by a lower driving-voltage in comparison with a device comprising conventional phosphorescent host materials. [Chemical formula 1].
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Paragraph 0398; 0415-0418
(2020/09/26)
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- Deuterated organic compounds for organic light-emitting diode and organic light-emitting diode including the same
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The present invention relates to an organic electroluminescent compound represented by chemical formula A and an organic light emitting device comprising the same. Substituents Y, Ar2 , L3 , K, p and x are as defined in the description of the invention. [Chemical A] (by machine translation)
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Paragraph 0755-0759
(2020/12/15)
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- An electroluminescen compound and an electroluminescent device comprising the same
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The present invention relates to an organic light-emitting compound represented by chemical formula 1. An organic electroluminescent device comprising the organic light-emitting compound in the present invention has excellent power efficiency, light-emitting efficiency, and long life cycle because the present invention can be operated by a lower driving-voltage in comparison with a device comprising conventional phosphorescent host materials.
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Paragraph 0420-0424
(2021/02/02)
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- Novel organic compounds for organic light-emitting diode and organic light-emitting diode including the same
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The present invention relates to an organic electroluminescent compound represented by chemical formula A and an organic light emitting device comprising the same. Substituents A_1 to A_4, R_1 to R_18, L_1, L_2, X, Y, m, n, s, p, and q are the same as defined in the detailed description of the invention.
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Paragraph 0361; 0376-0380
(2021/02/19)
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- New compounds and organic light-emitting diode including the same
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PURPOSE: A compound is provided to improve driving voltage and luminous efficiency of an organic electroluminescence device by having excellent light-emitting performance. CONSTITUTION: A compound is represented by chemical formula 1. An organic electroluminescence device comprises an anode, a cathode, and an electroluminescent layer comprising the compound and inserted between the anode and the cathode. The organic electroluminescence device additionally comprises one or more layers selected form a hole injection layer, a hole transport layer, an electro block layer, a hole block layer, an electron transport layer and an electron injection layer. The one or more layers are formed by a monomer deposition method or solution process.
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Paragraph 0623-0626
(2019/05/25)
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- Organic light emitting compound and organic light emitting device including the same
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Disclosed is an organic light emitting compound represented by Formula I: Also disclosed is an organic light emitting device including the organic light emitting compound. The organic light emitting device can be driven at a low voltage to achieve high power efficiency. In addition, the organic light emitting device has excellent luminescent properties, such as high luminance and high luminous efficiency. Due to these advantages, the organic light emitting device can be utilized as a display device or a lighting device.
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Page/Page column 47
(2019/06/24)
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- Pyrene derivatives having substituted cyclic amine groups and organic light-emitting diode including the same
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The present invention relates to a novel compound and an organic electroluminescent device comprising the same as luminous substances, and more specifically, to a novel compound represented by formula A or formula B and an organic electroluminescent device comprising the same.
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Paragraph 0217; 0268-0274
(2019/08/30)
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- New condensed aryl compounds and organic light-emitting diode including the same
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PURPOSE: A fused aryl compound is provided to improve low driving voltage and luminous efficiency by having excellent luminous performance while having stability. CONSTITUTION: A fused aryl compound is indicated in chemical formula 1. An organic electroluminescent device comprises an anode, a cathode, and a fused aryl compound inserted between the anode and the cathode. The fused aryl compound is comprised in an electroluminescent layer between the anode and the cathode. One or more layers selected from a hole injection layer, a hole transport layer, an electron block layer, a hole block layer, an electron transport layer, and an electron injection layer\ are additionally comprised in between the anode and the cathode.
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Paragraph 0587-0593
(2019/08/21)
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- Organic light-emitting device
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An organic light-emitting device includes a first electrode; a second electrode opposite to the first electrode; and an organic layer between the first electrode and the second electrode, and the organic layer including an emission layer that includes at
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Paragraph 0155; 0156; 0160; 0161
(2018/09/25)
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- A speedy route to sterically encumbered, benzene-fused derivatives of privileged, naturally occurring hexahydropyrrolo[1,2-b]isoquinoline
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A series of 15 benzene-fused hexahydropyrrolo[1,2-b]isoquinolonic acids with substantial degree of steric encumbrance has been prepared via a novel variant of the Castagnoli-Cushman reaction of homophthalic anhydride (HPA) and various indolenines. The employment of a special kind of a cyclic imine component reaction allowed, for the first time, isolating a Mannich-type adduct between HPA and an imine component which has been postulated but never obtained in similar reactions.
- Bakulina, Olga,Ivanov, Alexander,Suslonov, Vitalii,Darin, Dmitry,Krasavin, Mikhail
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supporting information
p. 1413 - 1424
(2017/07/28)
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- Oxo carbon-based compounds, a resin composition comprising the same and a filter containing the resin composition
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The invention relates to oxo carbon-based compounds, a resin composition comprising the same and a filter containing the resin composition. A novel oxo carbon-based compound is provided, the absorption spectrum in a visible-near infrared region does not h
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Paragraph 0326; 0327; 0328
(2016/10/10)
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- Compound and organic light emitting device comprising same
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Disclosed are a compound represented by chemical formula 1 and an organic light-emitting device comprising the same. The explanation with respect to a substituent in chemical formula 1 refers to the detailed description. The organic light-emitting device
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Paragraph 0468-0472
(2016/10/07)
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- Phenanthrene derivatives and organic light emitting diodes comprising the derivatives
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Provided in the present invention is an organic light emitting compound which is a phenanthrene derivative characterized by being represented by [chemical formula A]. If the compound is applied to an organic layer of an organic light emitting diode, a diode having excellent brightness and light emitting efficiency compared with an existing substance can be provided. [Chemical formula A]COPYRIGHT KIPO 2015
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Paragraph 0259-0262
(2016/10/27)
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- Oxidative palladium(II)-catalyzed dehydrogenative C-H/C-H cross-coupling of 2,3-substituted indolines with arenes at the C7 position
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Directed directing group: The C7 position of the indoline nucleus is difficult to address in C-H activation. An oxidative palladium(II) catalysis that allows for cross-dehydrogenative coupling in that position with activation of the C-H bond of the arene component is disclosed here. This C-H/C-H cross-coupling is applicable to various indolines acetylated at the nitrogen atom. Substitution at C2 is crucial for the C-H activation to occur at C7 (see scheme).
- Jiao, Lin-Yu,Oestreich, Martin
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supporting information
p. 10845 - 10848
(2013/09/02)
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- CONDENSED-CYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DIODE INCLUDING THE SAME
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Embodiments of the present invention are directed to a condensed-cyclic compound and an OLED including the same.
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Paragraph 0131; 0132
(2013/07/19)
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- Fischer indole synthesis in low melting mixtures
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Functionalized indoles are synthezised under mild conditions in a tartaric acid-dimethylurea melt. The melt serves as the solvent and as the catalyst. Under these reaction conditions, sensitive functional groups such as N-Boc, N-Cbz, or azides are stable, and indolenines are obtained regioselectively in excellent yields. The practical use of the method is demonstrated in the synthesis of the hormone melatonin.
- Gore, Sangram,Baskaran, Sundarababu,K?nig, Burkhard
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supporting information
p. 4568 - 4571
(2012/10/30)
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- Fast photochromic sterically hindered benzo[1,3]oxazines
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A series of new substituted benzo[1,3]oxazines presenting bulky substituents on the chiral oxazine centre were prepared from isopropyl ketones or substituted cyclohexanones. Laser irradiation of these uncoloured compounds in solution promotes the cleavage
- Prostota, Yaroslav,Coelho, Paulo Jorge,Pina, Jo?o,Seixas De Melo, Jo?o
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experimental part
p. 59 - 65
(2011/02/23)
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- New nonsteroidal androgen receptor modulators based on 4-(trifluoromethyl)-2(1H)-pyrrolidino[3,2-g]quinolinone
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A series of 2(1H)-pyrrolidino[3,2-g]quinolinones was prepared and tested for the ability to modulate the transcriptional activity of the human androgen receptor (hAR). The parent compound, 4-(trifluoromethyl)-2(1H)-pyrrolidino[3,2-g]quinolinone, displayed moderate interaction with hAR, but more substituted analogues, particularly 6,7-disubstituted compounds, were potent hAR agonists in vitro.
- Edwards, James P.,West, Sarah J.,Pooley, Charlotte L. F.,Marschke, Keith B.,Farmer, Luc J.,Jones, Todd K.
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p. 745 - 750
(2007/10/03)
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- Oxazoloindoles, Pyrrolo- and Azepino-indoles from 3H-Indole 1-Oxides and Acetylenecarboxylic Esters by Skeletal Rearrangements
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3H-Indole N-oxides 3 have been prepared from 3H-indoles 1 by hydride reduction followed by m-chloroperbenzoic acid oxidation.Reaction of 3 with dimethyl acetylenedicarboxylate (DMAD) and with methyl propiolate (MP), give a variety of products, all apparently formed by rearrangement of the initial isoxazole 1,3-dipolar cycloadduct, with the type of reaction being dependent on the 2-substituent in 3: the 2-phenyl derivative of 3 gives oxazoloindoles 5, and when 3 posseses a methyl or methylene substituent at C-2, both DMAD and MP give pyrroloindoles 6, with the MP reactions also yielding an azepinoindole 7 in each case.The structures of the products have been established by spectroscopy with those of 5b and 7b being confirmed by X-ray crystallography.
- Letcher, Roy M.,Sin, Della W. M.,Cheung, Kung-Kai
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p. 939 - 944
(2007/10/02)
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- Indolisation of cyclohexanone phenylhydrazones using phosphorous trichloride
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Fischer-type indolisation of phenylhydrazones (either preformed of formed in situ) of cyclohexanone and 4-, 3- and 2-methylcyclohexanones in the presence of PCl3 as a cyclising agent furnishes 1,2,3,4-tetrahydro-9H-carbazole, its 3- and 2-methyl derivatives and 11-methyltetrahydrocarbazolenine, respectively in high yields.
- Chakrabarty, Manas,Batabyal, Archana
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p. 199 - 201
(2007/10/02)
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- Alkylation of Cycloalkanoindoles via Indolylmagnesium Salts: Synthesis of 3H-Indoles and Oxidative Rearrangement to Spiro-3'-ones
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Alkylation of cycloalkanoindolylmagnesium iodide with alkyl halides has been analyzed to prepare cycloalkano-3H-indoles, methyl and N,N-dimethylpropyl derivatives.Spiro derivatives appear as secondary products in this reaction.Selectivity and optimization of the reaction has been determined and a mechanism for the formation of the spiro derivative is proposed.
- Rodriguez, Jose-Gonzalo,Andres, Angel San
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p. 1293 - 1299
(2007/10/02)
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- Compounds with Bridgehead Nitrogen. 42 - 1H NMR and Stereochemistry of Isomeric 6a-Methylperhydroindolobenzoxazines and the Position of Conformational Equilibrium in Perhydropyrrolooxazine
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The 1H NMR parameters of the NCH2O protons in the spectrum of perhydropyrrolooxazine show its existence in solution at room temperature in the O-inside cis-fused conformation, rel-(3aS,6aS,6bR,10aS,11aS)6a-Methylperhydroindolobenzoxazine and rel-(3aS,6aS,6bS,10aR,11aS)-6a-methylperhydroindolobenzoxazine are shohn to adopt cis- and trans-fused conformations, respectively, for the corresponding bicyclic moiety.
- Crabb, Trevor A.,Newton, Roger F.,Rouse, Janet
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p. 113 - 116
(2007/10/02)
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