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https://www.readbyqxmd.com/read/27922737/%C3%AF-conjugated-lewis-base-efficient-trap-passivation-and-charge-extraction-for-hybrid-perovskite-solar-cells
#1
Yuze Lin, Liang Shen, Jun Dai, Yehao Deng, Yang Wu, Yang Bai, Xiaopeng Zheng, Jiayu Wang, Yanjun Fang, Haotong Wei, Wei Ma, Xiao Cheng Zeng, Xiaowei Zhan, Jinsong Huang
A π-conjugated Lewis base is introduced into perovskite solar cells, namely, indacenodithiophene end-capped with 1.1-dicyanomethylene-3-indanone (IDIC), as a multifunctional interlayer which combines efficient trap-passivation and electron-extraction. Perovskite solar cells with IDIC layers yield higher photovoltages and photocurrents, and 45% enhanced efficiency compared with control devices without IDIC.
December 6, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27892638/a-new-nonfullerene-electron-acceptor-with-a-ladder-type-backbone-for-high-performance-organic-solar-cells
#2
Nailiang Qiu, Huijing Zhang, Xiangjian Wan, Chenxi Li, Xin Ke, Huanran Feng, Bin Kan, Hongtao Zhang, Qiang Zhang, Yan Lu, Yongsheng Chen
Nonfullerene acceptor FDICTF (2,9-bis(2methylene-(3-(1,1-dicyanomethylene)indanone))-7,​12-​dihydro-​4,​4,​7,​7,​12,​12-​hexaoctyl-​4H-​cyclopenta[2″,​1″:5,​6;3″,​4″:5',​6']​diindeno[1,​2-​b:1',​2'-​b']dithiophene) modified by fusing the fluorene core in a precursor, yields 10.06% high power conversion efficiency, and demonstrates that the ladder and fused core backbone in A-D-A structure molecules is an effective design strategy for high-performance nonfullerene acceptors...
November 28, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27823887/targeting-alzheimer-s-disease-by-investigating-previously-unexplored-chemical-space-surrounding-the-cholinesterase-inhibitor-donepezil
#3
Divan G van Greunen, Werner Cordier, Margo Nell, Chris van der Westhuyzen, Vanessa Steenkamp, Jenny-Lee Panayides, Darren L Riley
A series of twenty seven acetylcholinesterase inhibitors, as potential agents for the treatment of Alzheimer's disease, were designed and synthesised based upon previously unexplored chemical space surrounding the molecular skeleton of the drug donepezil, which is currently used for the management of mild to severe Alzheimer's disease. Two series of analogues were prepared, the first looking at the replacement of the piperidine ring in donepezil with different sized saturated N-containing ring systems and the second looking at the introduction of different linkers between the indanone and piperidine rings in donepezil...
October 20, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27731646/total-synthesis-of-coprinol
#4
Muthiah Suresh, Navin Kumar, Gorre Veeraraghavaiah, Sunit Hazra, Raj Bahadur Singh
The first synthesis of coprinol has been achieved from 2-methoxy-3,5-dimethylbenzaldehyde via the intermediacy of an indanone derivative where dialkylation, Friedel-Crafts acylation, demethylation, and regioselective formation of a primary -OH group from a chloroacetyl group are the key steps.
October 12, 2016: Journal of Natural Products
https://www.readbyqxmd.com/read/27662218/2-heteroarylidene-1-indanone-derivatives-as-inhibitors-of-monoamine-oxidase
#5
Magdalena S Nel, Anél Petzer, Jacobus P Petzer, Lesetja J Legoabe
In the present study a series of fifteen 2-heteroarylidene-1-indanone derivatives were synthesised and evaluated as inhibitors of recombinant human monoamine oxidase (MAO) A and B. These compounds are structurally related to series of heterocyclic chalcone derivatives which have previously been shown to act as MAO-B specific inhibitors. The results document that the 2-heteroarylidene-1-indanones are in vitro inhibitors of MAO-B, displaying IC50 values of 0.0044-1.53μM. Although with lower potencies, the derivatives also inhibit the MAO-A isoform with IC50 values as low as 0...
September 17, 2016: Bioorganic Chemistry
https://www.readbyqxmd.com/read/27629824/thio-and-semicarbazones-hope-in-the-search-for-treatment-of-leishmaniasis-and-chagas-disease
#6
Barbara V da Silva, Bianca N M Silva
BACKGROUND: Trypanosomiasis and leishmaniasis cause severe infections in humans and domestic animals in the tropics. Although typical diseases in Latin America, globalization and the migration of infected people has spread these diseases to countries in North America, Asia and Europe. Currently available drugs are not effective in the chronic phase, as well as causing side effects and the development of resistance. RESULTS: Among the chemical groups studied as potential anti-T...
September 9, 2016: Medicinal Chemistry
https://www.readbyqxmd.com/read/27578245/2-benzylidene-1-indanone-derivatives-as-inhibitors-of-monoamine-oxidase
#7
Magdalena S Nel, Anél Petzer, Jacobus P Petzer, Lesetja J Legoabe
In the present study, a series of twenty-two 2-benzylidene-1-indanone derivatives were synthesised and evaluated as inhibitors of recombinant human monoamine oxidase (MAO) A and B. The 2-benzylidene-1-indanone derivatives are structurally related to a series of benzylideneindanone derivatives which has previously been found to be MAO-B inhibitors. This study finds that the 2-benzylidene-1-indanones are MAO-B specific inhibitors with IC50 values <2.74μM. Among the compounds evaluated, twelve compounds exhibited IC50<0...
October 1, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/27565554/6-methoxy-indanone-derivatives-as-potential-probes-for-%C3%AE-amyloid-plaques-in-alzheimer-s-disease
#8
Dou-Dou Nan, Chang-Sheng Gan, Chen-Wei Wang, Jin-Ping Qiao, Xin-Meng Wang, Jiang-Ning Zhou
A series of 6-methoxy indanone derivatives was synthesized and evaluated as potential probes for β-amyloid plaque imaging in Alzheimer's disease (AD). Two derivatives (5d and 5k) displayed significant binding abilities in fluorescent staining experiments using the brain sections of AD patients. Two derivatives showed high binding affinities to β-amyloid aggregates (5j, Ki = 5.82 ± 0.19 nM) and brain homogenates of AD patients (5j, Ki = 18.96 ± 0.28 nM) in in vitro binding assay. With a log P value of 3...
July 30, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27495835/anticancer-activity-of-gallic-acid-template-based-benzylidene-indanone-derivative-as-microtubule-destabilizer
#9
Aastha Singh, Kaneez Fatima, Ankita Srivastava, Sadiya Khwaja, Dev Priya, Arjun Singh, Girish Mahajan, Sarfaraz Alam, Ajit K Saxena, D M Mondhe, Suaib Luqman, Debabrata Chanda, Feroz Khan, Arvind S Negi
Benzylidene indanones have been designed and synthesized from gallic acid, a plant phenolic acid as possible anticancer agent. The best analogue of the series, that is, 3-(3',4',5'-trimethoxyphenyl)-4,5,6-trimethoxy-2-(4˝-nitrobenzylidene)-indan-1-one (8) exhibited potent cytotoxicity (IC50 =3-10 μm) against several human cancer cell lines through microtubule destabilization (IC50 =1.54 μm) after occupying colchicine-binding site of β-tubulin. In cell cycle analysis, compound 8 exerted G2/M phase arrest in both MCF-7 and MDA-MB-231 cells and induced apoptosis...
November 2016: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/27490335/sulfoxide-based-enantioselective-nazarov-cyclization-divergent-syntheses-of-isopaucifloral%C3%A2-f-quadrangularin%C3%A2-a-and-pallidol
#10
Mei-Lin Tang, Peng Peng, Zheng-Yu Liu, Jian Zhang, Jian-Ming Yu, Xun Sun
The synthesis of enantiomerically pure 3-aryl substituted indanones is developed using an enantioselective sulfoxide-based Knoevenagel condensation/Nazarov cyclization procedure. After the reductive desulfonation of the methyl para-tolyl sulfoxide-containing chiral auxiliary under mild conditions, selected enantiomerically pure indanone is used for the divergent total syntheses of three resveratrol natural products (+)-isopaucifloral F, (+)-quadrangularin A, and (+)-pallidol.
October 4, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27355517/rapid-access-to-orthogonally-functionalized-naphthalenes-application-to-the-total-synthesis-of-the-anticancer-agent-chartarin
#11
Teresa A Unzner, Adriana S Grossmann, Thomas Magauer
We report the synthesis of orthogonally functionalized naphthalenes from simple, commercially available indanones in four steps. The developed method proceeds through a two-step process that features a thermally induced fragmentation of a cyclopropane indanone with simultaneous 1,2-chloride shift. Migration of the chloride substituent occurs in a regioselective manner to preferentially afford the para-chloronaphthol substitution pattern. The obtained naphthols are versatile building blocks that can be selectively modified and used for the efficient construction of biologically active molecules...
August 8, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27228381/synthesis-of-indole-substituted-indanones-via-palladium-ii-catalyzed-tandem-reaction-of-ortho-electron-deficient-alkynyl-substituted-aryl-aldehydes-with-indoles
#12
Jianbo Zhang, Xiuling Han, Xiyan Lu
A Pd(OAc)2-catalyzed cyclization reaction of ortho-electron-deficient alkynyl-substituted aryl aldehydes with indoles was accomplished, providing an efficient and economical way to synthesize indole-substituted indanones. The electron-withdrawing group attached to the alkyne and the nucleophilic indole play important roles in the formation of the indanone ring.
June 17, 2016: Organic Letters
https://www.readbyqxmd.com/read/27195605/tandem-bond-forming-reactions-of-1-alkynyl-ethers
#13
Thomas G Minehan
Electron-rich alkynes, such as ynamines, ynamides, and ynol ethers, are functional groups that possess significant potential in organic chemistry for the formation of carbon-carbon bonds. While the synthetic utility of ynamides has recently been expanded considerably, 1-alkynyl ethers, which possess many of the reactivity features of ynamides, have traditionally been far less investigated because of concerns about their stability. Like ynamides, ynol ethers are relatively unhindered to approach by functional groups present in the same or different molecules because of their linear geometry, and they can potentially form up to four new bonds in a single transformation...
June 21, 2016: Accounts of Chemical Research
https://www.readbyqxmd.com/read/27131308/efficiency-of-a-photoreactor-packed-with-immobilized-titanium-dioxide-nanoparticles-in-the-removal-of-acid-orange-7
#14
Behnaz Sheidaei, Mohammad A Behnajady
In this paper, the removal efficiency of Color Index Acid Orange 7 (AO7) as a model contaminant was investigated in a batch-recirculated photoreactor packed with immobilized titanium dioxide type P25 nanoparticles on glass beads. The effects of different operational parameters such as the initial concentration of AO7, the volume of solution, the volumetric flowrate, and the light source power in the photoreactor were investigated. The results indicate that the removal percent increased with the rise in volumetric flowrate and power of the light source, but decreased with the rise of the initial concentration of AO7 and the volume of solution...
May 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27064419/a-chiral-electrophilic-selenium-catalyst-for-highly-enantioselective-oxidative-cyclization
#15
Yu Kawamata, Takuya Hashimoto, Keiji Maruoka
Chiral electrophilic selenium catalysts have been applied to catalytic asymmetric transformations of alkenes over the past two decades. However, highly enantioselective reactions with a broad substrate scope have not yet been developed. We report the first successful example of this reaction employing a catalyst based on a rigid indanol scaffold, which can be easily synthesized from a commercially available indanone. The reaction efficiently converts β,γ-unsaturated carboxylic acids into various enantioenriched γ-butenolides under mild conditions...
April 27, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27011195/enantioselective-determination-of-polycyclic-musks-in-river-and-wastewater-by-gc-ms-ms
#16
Injung Lee, Anantha-Iyengar Gopalan, Kwang-Pill Lee
The separation of chiral compounds is an interesting and challenging topic in analytical chemistry, especially in environmental fields. Enantioselective degradation or bioaccumulation has been observed for several chiral pollutants. Polycyclic musks are chiral and are widely used as fragrances in a variety of personal care products such as soaps, shampoos, cosmetics and perfumes. In this study, the gas chromatographic separation of chiral polycyclic musks, 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclo-penta-γ-2-benzopyrane (HHCB), 7-acetyl-1,1,3,4,4,6-hexamethyl-1,2,3,4-tetra-hydronaphthalene (AHTN), 6-acetyl-1,1,2,3,3,5-hexamethylindane (AHDI), 5-acetyl-1,1,2,6-tetramethyl-3-iso-propylindane (ATII), and 6,7-dihydro-1,1,2,3,3-pentamethyl-4(5H)-indanone (DPMI) was achieved on modified cyclodextrin stationary phase (heptakis (2,3-di-O-methyl-6-O-tert-butyl-dimethylsilyl-β-CD in DV-1701))...
March 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/26934455/rhodium-ii-catalyzed-and-thermally-induced-intramolecular-migration-of-n-sulfonyl-1-2-3-triazoles-new-approaches-to-1-2-dihydroisoquinolines-and-1-indanones
#17
Run Sun, Yu Jiang, Xiang-Ying Tang, Min Shi
New rhodium(II)-catalyzed or thermally induced intramolecular alkoxy group migration of N-sulfonyl-1,2,3-triazoles has been developed, affording divergent synthesis of 1,2-dihydroisoquinoline and 1-indanone derivatives according to different conditions. N-Sulfonyl keteneimine is the key intermediate for the synthesis of dihydroisoquinoline, whereas the aza-vinyl carbene intermediate results in the formation of 1-indanone.
April 11, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/26922229/discovery-of-novel-sesquistilbene-indanone-analogues-as-potent-anti-inflammatory-agents
#18
Mei-Lin Tang, Chen Zhong, Zheng-Yu Liu, Peng Peng, Xin-Hua Liu, Xun Sun
To develop novel anti-inflammatory agents with improved pharmaceutical profiles, twenty-eight novel sesquistilbene indanone analogues were synthesized and evaluated for anti-inflammatory activity using RAW264.7 cells. Among these compounds, compound 11k was found to be one of the most potent analogues in inhibiting NO production in LPS-stimulated RAW264.7 cells. Furthermore, it could also significantly suppress LPS-induced iNOS and COX-2 expression and NO production through TLR4/JNK/NF-κB signaling pathway in a concentration dependent manner...
May 4, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/26920053/human-dehydrogenase-reductase-sdr-family-member-11-is-a-novel-type-of-17%C3%AE-hydroxysteroid-dehydrogenase
#19
Satoshi Endo, Namiki Miyagi, Toshiyuki Matsunaga, Akira Hara, Akira Ikari
We report characterization of a member of the short-chain dehydrogenase/reductase superfamily encoded in a human gene, DHRS11. The recombinant protein (DHRS11) efficiently catalyzed the conversion of the 17-keto group of estrone, 4- and 5-androstenes and 5α-androstanes into their 17β-hydroxyl metabolites with NADPH as a coenzyme. In contrast, it exhibited reductive 3β-hydroxysteroid dehydrogenase activity toward 5β-androstanes, 5β-pregnanes, 4-pregnenes and bile acids. Additionally, DHRS11 reduced α-dicarbonyls (such as diacetyl and methylglyoxal) and alicyclic ketones (such as 1-indanone and loxoprofen)...
March 25, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/26888484/mechanisms-and-reactivity-differences-for-the-cobalt-catalyzed-enantioselective-intramolecular-hydroacylation-of-ketones-and-alkenes-insights-from-density-functional-calculations
#20
Qingxi Meng, Fen Wang
Density functional theory (DFT) was used to study the cobalt(I)-catalyzed enantioselective intramolecular hydroacylation of ketones and alkenes. All intermediates and transition states were fully optimized at the M06/6-31G(d,p) level (LANL2DZ(f) for Co). The results demonstrated that the ketone and alkene present different reactivities in the enantioselective hydroacylation. In ketone hydroacylation catalyzed by the cobalt(I)-(R,R)-Ph-BPE complex, reaction channel "a" to (R)-phthalide was more favorable than channel "b" to (S)-phthalide...
March 2016: Journal of Molecular Modeling
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