114382-97-7Relevant articles and documents
Triphenylphosphine-m-sulfonate/carbon tetrabromide as an easily recoverable catalyst system for the efficient synthesis of xanthene and xanthenone derivatives under solvent-free conditions
Huo, Cong-De,Bao, Xia-Zhen,Hu, Dong-Cheng,Jia, Xiao-Dong,Sun, Chou-Gu,Wang, Cheng
, p. 699 - 701 (2014)
A solid complex, readily prepared from commercially available sodium triphenylphosphine-m-sulfonate (TPPMS) and carbon tetrabromide, can be used as an easily recoverable and reusable catalyst system for one-pot condensation of 2-naphthol with aldehydes to
Sulfonation of carbonized xylan-type hemicellulose: A renewable and effective biomass-based biocatalyst for the synthesis of O- and N-heterocycles
Ma, Jiliang,Peng, Xinwen,Zhong, Linxin,Sun, Runcang
, p. 9140 - 9150 (2018/06/11)
The application of biomass-based carbonaceous solid acids in catalysis is attracting increasing attention in the field of chemistry. In this study, a heterogeneous carbon-based solid acid biocatalyst (CXH-SO3H) with regular spherical structure was synthesized from xylan-type hemicellulose (XH) by a simple two-step method. The catalyst was successfully applied in the synthesis of O- and N-heterocycles with yields of 80-99% and 60-97%, respectively. In view of environment and economy, CXH-SO3H shows the merits of environmental friendliness, easy operation, simple work-up, excellent yields, and the avoidance of use of organic solvents and expensive catalysts. Moreover, the as-synthesized solid acid catalyst could be used for several cycles without significant loss in its catalytic activity. The results of FT-IR, XRD, and SEM showed that no distinct differences in physico-chemical structures of CXH-SO3H were observed. Thus, the eco-friendly CXH-SO3H catalyst is a promising candidate for green synthesis of O- and N-heterocycles from low-cost feed-stocks and has good prospect in partially substituting commercially available solid and liquid acid catalysts and precious metal catalysts.
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
One-pot synthesis of xanthene derivatives catalyzed by Fe(III) tetranitrophthalocyanine immobilized on activated carbon
Huang,Yao,Lin,Zhao,Hua,Gou
, p. 934 - 938 (2016/06/13)
Xanthene derivatives were synthesized by a multicomponent one-pot reaction of aromatic aldehydes, β-naphthol, and 5,5-dimethylcyclohexane-1,3-dione or 1,3-cyclohexanedione upon efficient and eco-friendly catalysis of Fe(III) tetranitrophthalocyanine immob
Nano-WO3-supported sulfonic acid: New, efficient and high reusable heterogeneous nano catalyst
Amoozadeh, Ali,Rahmani, Salman
, p. 96 - 107 (2014/12/11)
Nano-WO3-supported sulfonic acid [n-WO3-SO3H (n-WSA)] is easily prepared from the reaction of nano WO3 with chlorosulfonic acid as sulfonating agent. This new catalyst is characterized by X-ray diffraction(XRD), field emission scanning electron microscopy (FE-SEM), FT-IR spectroscopy, thermal gravimet-ric analysis (TGA), pH analysis and Hammett acidity function. Nano-WO3-supported sulfonic acid isused as an efficient and recyclable catalyst for some organic reactions such as synthesis of 1,8-dioxo-octahydroxanthene, tetrahydrobenzoxanthene and benzimidazolo quinazolinone derivatives. All of thereactions are very fast and the yields are excellent. The used catalyst was easily separated and reused for 10 runs without appreciable loss of its catalytic activity.
Nano-WO3-supported sulfonic acid: New, efficient and high reusable heterogeneous nano catalyst
Amoozadeh, Ali,Rahmani, Salman
, p. 96 - 107 (2015/02/18)
Nano-WO3-supported sulfonic acid [n-WO3-SO3H (n-WSA)] is easily prepared from the reaction of nano WO3 with chlorosulfonic acid as sulfonating agent. This new catalyst is characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), FT-IR spectroscopy, thermal gravimetric analysis (TGA), pH analysis and Hammett acidity function. Nano-WO3-supported sulfonic acid is used as an efficient and recyclable catalyst for some organic reactions such as synthesis of 1,8-dioxo-octahydroxanthene, tetrahydrobenzoxanthene and benzimidazolo quinazolinone derivatives. All of the reactions are very fast and the yields are excellent. The used catalyst was easily separated and reused for 10 runs without appreciable loss of its catalytic activity.
Xanthenones: Calixarenes-catalyzed syntheses, anticancer activity and QSAR studies
Da Silva, Daniel Leite,Silva Terra, Bruna,Ribeiro Lage, Mateus,Lúcia Tasca Góis Ruiz, Ana,Capeletti Da Silva, Cameron,Ernesto De Carvalho, Jo?o,Walkimar De Mesquita Carneiro, José,Terra Martins, Felipeo,Antonio Fernades, Sergio,De Fátima, ?ngelo
supporting information, p. 3280 - 3287 (2015/03/18)
An efficient method is proposed for obtaining tetrahydrobenzo[a]xanthene-11-ones and tetrahydro-[1,3]-dioxolo[4,5-b]xanthen-9-ones. The method is based on the use of p-sulfonic acid calix[n]arenes as catalysts under solvent-free conditions. The antiprolif
Chitosan synergistically enhanced by successive Fe3O4 and silver nanoparticles as a novel green catalyst in one-pot, three-component synthesis of tetrahydrobenzo[α]xanthene-11-ones
Mohammadi, Reza,Eidi, Esmaiel,Ghavami, Monireh,Kassaee, Mohammad Zaman
, p. 309 - 316 (2014/08/05)
Chitosan (CS) is modified with Fe3O4 nanoparticles composite through in situ co-precipitation of Fe3+ and Fe 2+ ions via NH4OH in an aqueous solution, resulting in magnetic Fe3O4
Niobium pentachloride catalyzed one-pot multicomponent condensation reaction of β-naphthol, aryl aldehydes and cyclic 1, 3-dicarbonyl compounds
Nasseri, Mohammad A.,Allahresani, Ali,Esmaeili, Abbas A.
, p. 91 - 96 (2014/03/21)
Niobium pentachloride catalyzed one-pot multicomponent condensation reaction of β-naphthol, aryl aldehydes and cyclic 1,3-dicarbonyl compounds. Thus, a variety of 8,9,10,12-tetrahydrobenzo[α] xanthen-11-one derivatives were produced in good to excellent y
Methanesulfonic acid-catalyzed one-pot synthesis of 12-aryl or 12-alkyl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one derivatives
Liu, Yu-Heng,Li, Lei
, p. 861 - 864 (2012/10/29)
An efficient synthesis of 12-aryl or 12-alkyl-8,9,10,12-tetrahydrobenzo[a] xanthen-11-one derivatives has been developed under solvent-free conditions by one-pot condensation of aldehydes, 2-naphthol, and cyclic 1,3-dicarbonyl compounds in the presence of