Journal ArticleDOI
An efficient synthesis of 2,2′-arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) and 1,8-dioxooctahydroxanthenes using ZnO and ZnO–acetyl chloride
Malek Taher Maghsoodlou,Sayyed Mostafa Habibi-Khorassani,Zahra Shahkarami,Nariman Maleki,Mohsen Rostamizadeh +4 more
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TLDR
In the presence of ZnO-acetyl chloride catalysts the reaction was limited to give only 1,8-dioxo-octahydroxanthenes 3a-k in very good yields.About:
This article is published in Chinese Chemical Letters.The article was published on 2010-06-01. It has received 49 citations till now. The article focuses on the topics: Dimedone & Acetyl chloride.read more
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Fur-Imine-Functionalized Graphene Oxide-Immobilized Copper Oxide Nanoparticle Catalyst for the Synthesis of Xanthene Derivatives.
TL;DR: Cu(II)-Fur-APTES/GO exhibits excellent result in the synthesis of xanthenes with reduced reaction time and higher yields and has a simple procedure, ease of product separation, and no byproducts.
Journal ArticleDOI
A highly efficient green synthesis of 1, 8-dioxo-octahydroxanthenes
TL;DR: Use of eco-friendly green Lewis acid, readily available catalyst and easy isolation of the product makes this a convenient method for the synthesis of either of the products.
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Succinimide-N-sulfonic acid: An efficient catalyst for the synthesis of xanthene derivatives under solvent-free conditions
TL;DR: In this article, a mild, simple and convenient procedure for the synthesis of xanthene derivatives is described via three component condensation of aldehydes with 2-naphthol, 1,3-cyclohexanedione and/or a mixture of 2-Naphthols and 1, 3-cycloehexanediones using succinimide-N -sulfonic acid as an efficient, cheap and readily synthesis catalyst under solvent-free conditions.
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Applications of a novel nano magnetic catalyst in the synthesis of 1,8-dioxo-octahydroxanthene and dihydropyrano[2,3-c]pyrazole derivatives
TL;DR: In this paper, a nano-structured organo solid catalyst was used for the cascade synthesis of 1,8-dioxo-octahydroxanthene derivatives by the condensation reaction between dimedone and various aldehydes at 80°C under solvent-free conditions.
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[Et3NH][HSO4] catalyzed efficient and green synthesis of 1,8-dioxo-octahydroxanthenes
Zhongqiang Zhou,Xiaocui Deng +1 more
TL;DR: In this paper, a simple and efficient procedure for synthesis of 1,8-dioxo-octahydroxanthenes by one-pot condensation of aromatic aldehydes with 5,5-dimethyl-1,3-cyclohexanedione under solvent-free conditions using ionic liquid [Et 3 NH][HSO 4 ] as catalyst is described.
References
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HClO4–SiO2 and PPA–SiO2 catalyzed efficient one-pot Knoevenagel condensation, Michael addition and cyclo-dehydration of dimedone and aldehydes in acetonitrile, aqueous and solvent free conditions: Scope and limitations
TL;DR: In this article, the scope and limitations of the two catalysts in various reaction conditions examined were described, and both HClO4−SiO2 and PPA-SiO 2 catalysts yielded only 4 as the product in aqueous medium.
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Chemical Aspects of Santalin as a Histological Stain
Arnab Banerjee,Abhijit Mukherjee +1 more
TL;DR: The structural formulae of the santalins are presented and their differences from santarubins indicated and the possible mechanism of staining is discussed.
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Reactions on a solid surface. A simple, economical and efficient Friedel-Crafts acylation reaction over zinc oxide (ZnO) as a new catalyst.
TL;DR: Zinc oxide (ZnO) brings about a rapid Friedel-Crafts acylation of a range of activated and unactivated aromatic compounds such as anisole and chlorobenzene with acid chlorides in solvent-free conditions at room temperature.
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Solvent-Free and One-Step Beckmann Rearrangement of Ketones and Aldehydes by Zinc Oxide
Hashem Sharghi,Mona Hosseini +1 more
TL;DR: In the presence of zinc oxide and without any additional organic solvents, the Beckmann rearrangement of several ketones and aldehydes was performed in good yields as mentioned in this paper.