313986-14-0Relevant academic research and scientific papers
Efficient synthesis of 1,8-dioxo-octahydroxanthenes catalyzed by β-cyclodextrin grafted with butyl sulfonic acid in aqueous media
Gong, Kai,Wang, Hualan,Wang, Shuxin,Wang, Ying,Chen, Jinghua
, p. 1249 - 1255 (2015)
β-Cyclodextrin was functionalized with butyl sulfonic acid to give an efficient, eco-friendly catalyst for the synthesis of 1,8-dioxo-octahydroxanthenes via the one-pot condensation of aromatic aldehydes and active methylene carbonyl compounds in aqueous
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).
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.]
Condensation of 1,3-cyclohexanedione with aromatic aldehydes catalyzed by acidic ionic liquids
Kang, Hui,Hu, Yi,Huang, He,Wei, Ping
scheme or table, p. 223 - 227 (2009/04/14)
An efficient and convenient approach to the synthesis of 9-aryl-2, 3, 4, 5, 6, 7-hexahydro-2H-Xanthene-1, 8-dionc by condensation of 1, 3-cyclohexanedione with aromatic aldehydes catalyzed by acid ionic liquid 1-methyllimidazolium hydrogen sulphate ([Hmim
