37097-20-4Relevant academic research and scientific papers
Molecular iodine catalyzed synthesis of aryl-14H-dibenzo[a, j]xanthenes under solvent-free condition
Pasha, Mohamed A.,Jayashankara, Vaderapura P.
, p. 621 - 623 (2007)
Molecular iodine efficiently catalyzes the reaction of β-naphthol and araldehydes on a preheated hot plate at 90-95 °C to give biologically active aryl-14H-dibenzo[a, j]xanthenes under solvent-free condition. The yields are excellent and the reactions go
4H-Chromenes as 1,3-bielectrophiles in the reaction with 2-aminobenzimidazole: synthesis of pyrimido[1,2-a]benzimidazoles
Osyanin, Vitaly А.,Osipov, Dmitry V.,Korzhenko, Kirill S.,Demidov, Oleg P.,Klimochkin, Yuri N.
, p. 588 - 593 (2021)
[Figure not available: see fulltext.] A method for the preparation of pyrimido[1,2-a]benzimidazoles containing a 2-hydroxybenzyl or (2-hydroxynaphthalen-1-yl)methyl group at position 3 was proposed based on the reaction of β-carbonyl-substituted 4H-chromenes and their benzo analogs with 2-aminobenzimidazole. In the case of chromenes substituted in the methylene fragment, 7,13a-dihydro-5H-benzo[5',6']chromeno-[3',2':5,6]pyrimido[1,2-a]benzimidazoles were isolated.
Design and characterization of [(Et)3?N-H]FeCl4 as a nanomagnetic ionic liquid catalyst for the synthesis of xanthene derivatives under solvent-free conditions
Ezabadi, Ali,Salami, Masoumeh
, (2022/01/24)
The triethylamine-based nanomagnetic ionic liquid, [(Et)3?N-H]FeCl4, was synthesized, and its structural and chemical characteristics were detected. The thermogravimetric analysis indicated its high thermal stability with a decomposi
Fabrication of activated carbon sulfuric acid as an excellent and novel solid acid catalyst, evaluating its catalytic activity in synthesizing 1,8-dioxo-octahydroxanthenes and 14-aryl-14H-dibenzo[a,j]xanthenes
Marandi, Alireza,Koukabi, Nadiya,Zolfigol, Mohammad Ali
, p. 3145 - 3163 (2021/05/03)
In this work, for the first time, a novel and innovative procedure has been utilized to chemically functionalize activated carbon (AC) based on the sulfonation reaction, which can be used in catalytic reactions as a strong solid acid. For this aim, AC mus
Solvent-free synthesis of 14-aryl-14H-dibenzo[a-j]xanthenes using Fe3O4@Al2O3@SiO2@Fe2O3 as a green catalyst
Darya, Naghmeh,Tajik, Hassan
supporting information, p. 3546 - 3564 (2021/11/04)
We report, a novel, green, nano-sized particles as a sandwich nano-capsule multilayer catalyst (SNC@MC) [Fe3O4@Al2O3@SiO2@Fe2O3] for the efficacious one-pot synthesis of 14-aryl-
A rapid and quantitative synthesis of xanthene derivatives using sulfonated graphitic carbon nitride under ball‐milling
Azizi, Najmedin,Ghaffarzadeh, Mohammad,Qareaghaj, Omid Hosseinchi
, (2021/07/02)
A truly green, solventless, and fast protocol for the quantitative preparation of biologically active xanthene derivatives with 10 mol% sulfonated graphitic carbon nitride (Sg─CN) as a heterogeneous acidic catalyst was developed. Excellent yields, low cost, solvent‐free conditions, high catalytic activity, reusability of the catalyst, simple workup, and heterogeneous carbon‐based catalyst make the present method particularly attractive from a green chemistry perspective.
Br?nsted Acidic Ionic Liquid-Catalyzed Synthesis of 14-Aryl-14H-dibenzo[a,j]xanthenes with Controlled Microwave Heating under Solvent-Free Conditions
Huynh, C. C.,Le, T. N.,Tran, P. H.
, p. 504 - 508 (2020/04/29)
Abstract: 1-Methyl-3-sulfo-1H-imidazol-3-ium chloride([Msim]Cl) catalyzed the condensation of β-naphthol with aromatic aldehydesunder microwave irradiation. This method is efficient to synthesizedibenzoxanthene derivatives in excellent yields, and the cat
Novel ionic liquid [Et3N-SO3H][MeSo3]: Synthesis, characterization and catalytic performance for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes
Sadeghi-Takallo, Masoud,Zare, Abdolkarim
, p. 69 - 76 (2019/03/21)
The main aim of this work is introducing a novel protic acidic ionic-liquid catalyst for organic synthesis. Thus, N,N-diethyl-N-sulfoethanaminium methanesulfonate ([Et3N-SO3H][MeSO3]) was synthesized by the reaction of triethylamine with chlorosulfonic ac
High acidity cellulose sulfuric acid from sulfur trioxide: A highly efficient catalyst for the one step synthesis of xanthene and dihydroquinazolinone derivatives
Yue, Xiaofei,Wu, Zhiqiang,Wang, Gang,Liang, Yanping,Sun, Yanyan,Song, Manrong,Zhan, Haijuan,Bi, Shuxian,Liu, Wanyi
, p. 28718 - 28723 (2019/09/30)
A cellulose sulfonate catalyst (HS-cellulose sulfonate) with high stability, excellent catalytic activity and high acidity value (about 1.55 mmol g-1) was successfully prepared by SO3 gas phase sulfonation. The basic morphology and nanostructure of the catalyst were determined by HRTEM, XRD, IR, TG, etc. In addition, the catalyst was applied to the catalytic reaction of a dihydroquinazolinone derivative and a xanthene compound, and very valuable results were obtained. The development and preparation of cellulose sulfonate catalysts provide a good approach for the development and application of cellulose, and also an important application of green organic catalytic synthesis methodology.
Sulfamic acid functionalized 3D-network nanoporous polymer based on calix[4]resorcinarene: a recyclable heterogeneous nanocatalyst for the efficient synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under thermal neat conditions
Mouradzadegun, Arash,Mostafavi, Mahsa Alsadat,Ganjali, Mohammad Reza
, p. 25 - 36 (2018/05/22)
Abstract: The new synthesized sulfamic acid functionalized catalyst on the basis of calix[4]resorcinarene catalyzed successfully and efficiently the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives through a one-pot condensation reaction of β-nap
