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• 623-27-8 terephthalaldehyde, 
• 135-19-3 β-naphthol 
• 93-09-4 naphthalene-2-carboxylate 

Relevant academic research and scientific papers

Antimony (III) acetate as a versatile and efficient catalyst for synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes at room temperature

Antimony (III) acetate was used in the one-pot three-component synthesis of biologically active 14-aryl-14H-dibenzo[a,j ] xanthenes from the condensation between arylaldehydes and naphthol under solvent-free conditions at ambient temperature. This methodo

Chitosan and imide-functional Fe3O4 nanoparticles to prepare new xanthene based poly(ether-imide) nanocomposites

In this work a new series of multifunctional nanocomposites were synthesized based on a soluble poly(ether-imide). The poly(ether-imide) was successfully synthesized via direct polycondensation reaction. A methyl rich diamine containing xanthene group as a new monomer was synthesized and used for polymerization. The xanthene based poly(ether-imide) was characterized using size exclusion chromatography (SEC) and nuclear magnetic resonance (NMR). Fe3O4 nanoparticles were imide-functionalized by a dianhydride, chitosan and phenylalanine. The functional Fe3O4 nanoparticles were incorporated into the new synthesized poly(ether-imide). Effects of the functionalized Fe3O4 nanoparticles on the thermal and combustion properties of the corresponding nanocomposites were investigated. Thermogravimetric analysis (TGA) results indicated that the thermal stability and char yields of the nanocomposites were enhanced compared to the neat poly(ether-imide). Microscale combustion calorimetry (MCC) revealed that the synthesized poly(ether-imide) had low flammability. The incorporation of functional Fe3O4 nanoparticles could further improve the combustion properties of poly(ether-imide). The high interaction between poly(ether-imide) and functional Fe3O4, the presence of an imide group and high hydroxyl content of the functional Fe3O4 nanoparticles seem to be responsible for the improvement of the thermal and combustion properties. Furthermore, the presence of methyl, ether and bulky xanthene groups in the polyimide backbone decreased the glass transition temperature (Tg) and increased the solubility in organic solvents. These properties will be useful for processing and new applications of poly(ether-imide).

Synthesis of new mixed-bistriarylmethanes and novel 3,4-dihydropyrimidin-2(1H)one derivatives

Firstly, triarylmethanes bearing formyl groups (TRAM-CHOs) have been synthesized by the reaction of arenes with aromatic dialdehydes catalyzed by sulfuric acid immobilized on SiO2 under solvent-free grinding conditions in good yields and short grinding time. Secondly, condensation of TRAM-CHOs with several arenes proceeded rapidly within a few minutes to afford the new corresponding mixed-bistriarylmethanes in excellent yields. TRAM-CHOs were also found to be valuable precursors for the Biginelli reaction to synthesize a variety of 3,4-dihydropyrimidin-2(1H)-one-triarylmethane hybrid derivatives.

Fabrication and characterization of novel high-performance fluorinated polyimides with xanthene pendent architecture: Study of thermal, photophysical, antibacterial and heavy metal ion adsorption behavior

Two series of new fluorescent polyimides (PIs) with different functional groups such as flexible ether linkages, substituted imidazole, photoactive xanthene pendant, and electron withdrawing CF3groups were prepared using novel monomers and thre

The acid-functional ionic liquid catalytic synthesis of benzo xanthene derivatives

The invention discloses an acidic bifunctional ionic liquid catalysis method for synthesis of benzoxanthene derivatives. The key points of the technical scheme provided by the invention are as below: the acidic bifunctional ionic liquid catalysis method for synthesis of the benzoxanthene derivative employ aromatic aldehyde and 2-naphthol as raw materials and employs the acidic bifunctional ionic liquid comprising cation containing hydrogen bond donor and Bronsted acidic anion as the catalyst, and the raw materials and the catalyst are heated to 110-125 DEG C at atmospheric pressure to synthesize the benzoxanthene derivative. The invention adopts the bifunctional acidic ionic liquid as the catalyst; the materials have wide sources and are simple for preparation and low in cost; the catalyst has low dosage, high catalytic activity, and can be recycled; and the reaction process can be performed under solvent-free conditions to avoid the use of organic solvents, so as to achieve environmental and economical double benefits. The method for the synthesis of the benzoxanthene derivatives is efficient, environmentally friendly, and conducive to large-scale industrial production.

Efficient synthesis of xanthene derivatives using carboxyl functionalized graphene quantum dots as an acidic nano-catalyst under microwave irradiation

Carboxyl functionalized graphene quantum dots (CGQDs) were applied as a highly efficient and green acidic catalyst for the coupling reaction of 2-naphthole and benzaldehyde derivatives for the preparation of 14H-dibenzo xanthene derivatives, under solvent

An efficient and reusable ionic liquid catalyst for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under solvent-free conditions

In this work, it was found that acidic protic ionic liquid N,N-dimethylaminoethanol hydrosulfate ([DMEA][HSO4]) was an efficient and reusable catalyst for the one-pot synthesis of 14-aryl-14H-dibenzo[a,j] xanthenes under solvent-free conditions. This ionic liquid is very cheap, air and water stable, and can be easily recovered and reused for at least six cycles. The catalytic system described here is a green protocol since in the one-pot synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes, the yield of the target compounds is excellent, operation and work-up procedures are simple, and no volatile organic solvents have been used. It is suggested that the synergetic effect of the cation and the anion of this ionic liquid is the main reason for the high catalytic activity and high chemo-selectivity. Scale-up experiments also suggest that this catalytic system has potential in industrial application. This journal is the Partner Organisations 2014.

Application of nanosized Cu0.5Co0.5Fe2O4 spinel ferrite as a nanocatalyst in the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives under solvent-free conditions

Copper and cobalt substituted spinel ferrites Cu1-xCoxFe2O4 (0 ≤ X ≤ 1) have been synthesized by using hydrothermal method. The resultant spinel ferrites were systematically characterized by different techniques

Application of highly sulfonated single-walled carbon nanotubes: An efficient heterogeneous catalyst for the one-pot synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under solvent-free conditions

Highly sulfonated single-walled carbon nanotube-catalyzed synthesis of 14-aryl-14H- dibenzo[a,j]xanthenes in excellent yields and very short reaction times. Sulfonated single- walled carbon nanotubes are prepared using a chemical and simple process and it

FeCl3.nano SiO2: An efficient heterogeneous nano catalyst for the synthesis of 14-Aryl-14H-dibenzo[a,j]xanthenes and 1,8-Dioxo-octahydro-xanthenes under solvent-free conditions

A novel, efficient and eco-friendly procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydroxanthenes is described through one-pot condensation of 2-naphthol and dimedone with aryl aldehydes in the presence of nano silica-s