19419-24-0Relevant articles and documents
Application of SiO 2 nanoparticles as an efficient catalyst to develop syntheses of perimidines and tetraketones
Alinezhad, Heshmatollah,Ahmadi, Armin,Hajiabbasi, Parvin
, (2019/04/10)
Abstract: In this paper, we explore the catalytic activity of SiO 2 nanoparticles (NPs) as an eco-friendly, efficient and reusable catalyst in the synthesis of 2,3-dihydro-1H-perimidines as well as tetraketones. For tetraketones syntheses, a si
Merging supramolecular catalysis and aminocatalysis: Amino-appended β-cyclodextrins (ACDs) as efficient and recyclable supramolecular catalysts for the synthesis of tetraketones
Ren, Yufeng,Yang, Bo,Liao, Xiali
, p. 22034 - 22042 (2016/03/08)
Well-designed amino-appended β-cyclodextrins (ACDs) with an amino side chain of different lengths at the primary face of β-CD were synthesized and employed in the catalytic synthesis of a series of tetraketones as supramolecular catalysts in water for the first time. Yields of 58-97% were obtained with up to 30 examples of substrate. The catalyst could be recycled easily, while a 92% yield and 84% rate of catalyst recovery could be achieved after 8 cycles of catalyst recycling. Moreover, a catalytic mechanism merging supramolecular catalysis and aminocatalysis could be proposed through detailed 1D and 2D NMR, ESI-MS and Job plot analyses. This protocol retained the promising characteristics of ambient temperature, green medium, simple operation, broad substrate scope, excellent yields, superb catalyst recycling performance and unique catalytic mechanism.
A four-ketone derivative and its preparation method and application
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Paragraph 0027; 0028; 0029, (2016/10/10)
The invention provides tetrone derivatives as well as a preparation method and application thereof. The derivatives have a general formula structure shown in the specification, wherein in the structure, R1 is any one of -H, 4-OCH3, 2-Cl, 3,4-(OCH3)2, 4-CH
L-Proline-catalysed the synthesis of aromatic aldehydes and ketones and their acridione derivatives at room temperature
Wang, Fang-Ming,Bao, Dan,Hu, Bing-Xiang,Zhou, Ze-Yu,Huang, Deng-Deng,Chen, Li-Zhuang,Liu, Yang-Mei
, p. 445 - 450 (2015/11/03)
A series of xanthene derivatives were prepared from cyclohexane-1,3-dione and aromatic aldehydes through Knoevenagel-Michael and cyclisation reactions in methanol:ethanol mixture (1:1), catalysed by a very small amount of l-proline at room temperature. Is
Aldonitrones as aldehyde equivalents: An efficient, green, and novel protocol for the synthesis of 1,8-dioxo-octahydroxanthenes
Kumar, Dhruva,Suresh,Sandhu, Jagir S.
, p. 2739 - 2747 (2013/08/23)
A novel, self-catalyzed, solvent-free, microwave-enhanced, green, and efficient protocol for the synthesis of 1,8-dioxo-octahydroxanthenes and bis-5,5-dimethyl-1,3-cyclohexanediones by condensing aldo-nitrones (imine oxide) and dimedone (5,5-dimethyl-1,3-
A green and highly efficient protocol for catalyst-free Knoevenagel condensation and Michael addition of aromatic aldehydes with 1,3-cyclic diketones in PEG-400
Firouzeh, Nemati,Hossein, Kiani
experimental part, p. 2407 - 2410 (2012/02/04)
A convenient, highly efficient and green approach for synthesis of tetraketones from aromatic aldehydes with dimedone and 1,3-indanedione at room temperature in PEG-400 is described. The use of PEG-400 as the reaction medium and avoiding the use of any ca
An efficient and simple synthesis of tetraketones catalyzed by Yb(OTf) 3-sio2 under solvent free conditions
Kameshwara Rao,Kumar, Muthyala Manoj,Kumar, Anil
experimental part, p. 1128 - 1135 (2011/10/04)
A novel and efficient three-component one-pot condensation method has been described for the synthesis of tetraketones or arylmethylene[bis(3-hydroxy-2- cyclohexene-1-ones)] using Yb(OTf)3-SiO2 and amine as catalytic system under sol
Fluorescence spectroscopic evidence for hydrogen bonding and deprotonation equilibrium between fluoride and a thiourea derivative
Ashokkumar, Pichandi,Ramakrishnan, Vayalakkavoor T.,Ramamurthy, Perumal
experimental part, p. 13271 - 13277 (2011/02/24)
Interaction of anions with thiourea-linked acridinedione fluorophore was studied by absorption, 1H NMR, steady-state and time-resolved fluorescence techniques. Addition of AcO- and H2PO 4- shows a gen
Synthesis and laser activity of halo-acridinedione derivatives
Kaya, Muharrem,Yildirir, Yilmaz,Tuerker, Lemi
experimental part, p. 294 - 297 (2009/07/19)
Synthesis of 10-(halophenyl)-9-(4-methoxyphenyl)-3, 4, 6, 7, 9, 10-hexahydroacridine-1, 8-(2H, 5H)-dione derivates have been prepared and their absorption, emission, and laser properties have been evaluated. The structures of all the synthesized compounds
Three component condensation of 6-quinolylamine with aromatic aldehydes and cyclohexyl 1,3-diketones
Kozlov,Gusak,Tkachev
, p. 740 - 747 (2008/03/11)
A three component condensation of 6-quinolylamine with 4-bromo-or 4-methoxybenzaldehyde, and 1,3-cyclohexanedione or dimedone gave 12-(4-bromophenyl)-and 12-(4-methoxyphenyl)-9,9-dimethyl-8,9,10,12-tetrahydro- 7H-benzo[b][4,7]phenanthrolin-11-ones. The re