95200-84-3Relevant academic research and scientific papers
Introduction of a trinuclear manganese(iii) catalyst on the surface of magnetic cellulose as an eco-benign, efficient and reusable novel heterogeneous catalyst for the multi-component synthesis of new derivatives of xanthene
Ghamari Kargar, Pouya,Bagherzade, Ghodsieh,Eshghi, Hossein
, p. 4339 - 4355 (2021/02/03)
In this work, the new trinuclear manganese catalyst defined as Fe3O4@NFC@NNSM-Mn(iii) was successfully manufactured and fully characterized by different techniques, including FT-IR, XRD, TEM, SEM, EDX, VSM, and ICP analysis. There have been reports of the use of magnetic catalysts for the synthesis of xanthine derivatives. The critical potential interest in the present method include short reaction time, high yields, recyclability of the catalyst, easy workup, and the ability to sustain a variety of functional groups, which give economical as well as ecological rewards. Also, the synthesized catalyst was used as a recyclable trinuclear catalyst in alcohol oxidation reactions at 40 °C. The magnetic catalyst activity of Fe3O4@NFC@NNSM-Mn(iii) could be attributed to the synergistic effects of the catalyst Fe3O4@NFC@NNS-Mn(iii) with melamine. Employing a sustainable and safe low temperature, using an eco-friendly solvent, no need to use any additive, and long-term stability and magnetic recyclability of the catalyst for at least six successive runs are the advantages of the current protocol towards green chemistry. This protocol is a benign, environmentally friendly method for heterocycle synthesis. This journal is
Multi-component reactions of cyclohexan-1,3-diketones to produce fused pyran derivatives with antiproliferative activities and tyrosine kinases and pim-1 kinase inhibitions
Alwan, Ensaf Sultan,Ibrahim, Rehab Ali,Mohareb, Rafat Milad
, p. 51 - 64 (2021/06/07)
In this work the multi-component reactions of either of the arylhydrazocyclohexan-1,3-dione derivatives 3a–c with either of benzaldehyde (4a), 4-chlorobenzaldehyde (4b) or 4-methoxybenzaldehyde (4c) and either malononitrile (5a) or ethyl cyanoacetate (5b)
Magnetic Fe–Cr–Ni oxide alloy nano-belts prepared from the chemical decomposition of a stainless steel screw (a top-down approach): an efficient and cheap catalyst for multicomponent reactions
Kazemnejadi, Milad,Sharafi, Zeinab,Mahmoudi, Boshra,Zeinali, Atefeh,Nasseri, Mohammad Ali
, p. 777 - 787 (2019/11/21)
Abstract: A new, cheap, and accessible method has been used for the preparation of nano-belts from the chemical decomposition (top-down approach) of a cheap stainless steel screw and found as an efficient magnetically recyclable nanocatalyst for the prepa
Selective synthesis of spiro and dispiro compounds using Mn(III)-based oxidation of tetracarbonyl compounds
Hisano, Kazuki,Nishikawa, Satomi,Nishino, Hiroshi,Shibuya, Keisuke,Yokote, Suzuka
, (2020/04/21)
The Mn(III)-based oxidation of methylenebis(cyclohexanedione)s and methylenebis(piperidinedione)s as a tetracarbonyl compound was investigated under various conditions, selectively producing spiro dihydrofurans and dispiro cyclopropanes depending on the solvent. The mechanism for the formation of the spiro dihydrofurans and dispiro cyclopropanes was discussed. In addition, a simple synthesis of a new type of alkaloid, 3,4,6,7,8,10-hexahydro-1H-pyrano[3,2-c:5,6-c’]dipyridine-1,9(2H)-diones, was demonstrated.
Zinc-containing ionic liquid as a dual solvent-catalyst in base-free condensations under ultrasonic irradiation
Ghafuri, Hossein,Yaghoubi, Soheila,Zand, Hamid Reza Esmaili
, (2019/08/12)
In this study, natural-based ionic liquid (IL) using caffeine (Caff), trietahnolamine (TEA) and ZnBr2, [Caff-TEA]+[ZnBr3]?, which features high catalytic activity and environmentally-friendly nature was synthesized with melting point of 76?°C by a facile method. The synthesized [Caff-TEA]+[ZnBr3]? has high catalytic activity as both of catalyst and solvent in condensation reactions for the synthesis of benzylidenes, bis-hydroxyenones and xanthenes. Synthesized IL was characterized by proton nuclear magnetic resonance (1HNMR), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Energy-dispersive X-ray spectroscopy (EDX) analysis. Also synthesized heterocycles were characterized by FT-IR, proton nuclear magnetic resonance (1HNMR) and carbon nuclear magnetic resonance (13CNMR).
An efficient route to 1,8-dioxo-octahydroxanthenes and -decahydroacridines using a sulfated zirconia catalyst
Kahandal, Sandeep S.,Burange, Anand S.,Kale, Sandip R.,Prinsen, Pepijn,Luque, Rafael,Jayaram, Radha V.
, p. 138 - 145 (2017/05/04)
Sulfated zirconia results to be a very efficient catalyst for the synthesis of 1,8-dioxo-octahydroxanthenes and 1,8-dioxo-decahydroacridines without tedious work-up procedures. While 1,8-dioxo-octahydroxanthenes are prepared from aldehyde and 5,5-dimethyl-1,3-cyclohexenedione (dimedone), 1,8-dioxo-decahydroacridines are prepared from this reactant mixture with amines. This method provides a mild catalytic protocol for the synthesis of functionalized xanthene and acridine derivatives. The catalysts were characterized by XRD, FT-IR, TGA-DSC, SEM-EDAX and surface acidity and showed excellent re-usability up to 6 consecutive cycles.
Facile and rapid synthesis of diverse xanthene derivatives using lanthanum(III) chloride/chloroacetic acid as an efficient and reusable catalytic system under solvent-free conditions
Pouramiri, Behjat,Shirvani, Maryam,Kermani, Esmat Tavakolinejad
, p. 483 - 493 (2017/07/10)
LaCl3/ClCH2COOH was used as an efficient, and recyclable catalytic system for synthesis of 11H-benzo[a]xanthene-11-one, hexahydro-1H-xanthene- 1,8(2H)-dione and 11-aryl-10H-diindeno[1,2-b:2',1'-e]pyran-10,12(11H)- -dione derivatives
Natural phosphate as an efficient and green catalyst for synthesis of tetraketone and xanthene derivatives
Fallah, Azadeh,Tajbakhsh, Mahmood,Vahedi, Hooshang,Bekhradnia, Ahmadreza
, p. 29 - 43 (2017/01/14)
Abstract: Natural phosphate was applied as an efficient and ecofriendly catalyst for the synthesis of tetraketones (2–2.5?h, 90–100?%) and xanthenes (6.5–8.5?h, 84–95?%) via Knoevenagel–Michael cascade reaction of aromatic aldehydes with 1,3-cyclic diketones in water and ethanol, respectively. This protocol provides several advantages over the traditional chemical synthesis, such as simple work-up, easy handling procedure, non-toxicity and stability of catalyst, low cost and environmental friendliness. Graphical Abstract: [Figure not available: see fulltext.]
Method for preparation of 9-aryl-2, 3, 4, 5, 6, 7-hexahydro-2H-xanthene-1, 8-dione without catalyst
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Paragraph 0016, (2017/05/18)
Belonging to the technical field of chemical material preparation, the invention provides a method for synthesis of 9-aryl-2, 3, 4, 5, 6, 7-hexahydro-2H-xanthene-1, 8-dione without catalyst. The method includes: carrying out condensation reaction on aroma
Efficient synthesis of xanthenedione derivatives using cesium salt of phosphotungstic acid as a heterogeneous and reusable catalyst in water
Thakur, Ashima,Sharma, Alka,Sharma, Abha
supporting information, p. 1766 - 1771 (2016/10/31)
Cs2.5H0.5PW12O40has been reported to be an efficient catalyst for the synthesis of 1,8-dioxo-octahydroxanthene from aldehydes and 1,3-cyclohexanedione/dimedone in water. This approach is environmentally benign with clean synthetic procedure, short reaction time, easy workup procedure, excellent yield, and regeneration of catalyst, which made this protocol efficient and safe.
