Supercritical diethylether: A novel solvent for the synthesis of aryl-3,4,5,6,7,9-hexahydroxanthene-1,8-diones

The Synthesis and Characterization of Novel Pd and Cu vic-dioxime precursors for Their Supercritical Deposition on Multiwalled Carbon Nanotubes

“…This is due the presence of two different =N-OH groups in the ligand. The rest of the peaks observed in the1 H NMR and NMR spectra were consistent with what was expected. The expected number of peaks was present in the 19 F NMR spectrum.…”

“…Our group has been working on developing new precursors used in the scCO2 deposition due to the limited alternatives in the literature. So far, we have been able to synthesize Pd(II) complexes of phenanthrenequinone dioxime and dimethylglyoxime ligands and carried out depositions on alumina in the scCO2 medium and used the nanocatalysts for Suzuki-Miyaura coupling reactions (1). In addition to this, we also synthesized bipyridyl-derived Pd(II) complexes and deposited Pd on SBA-15 supports in the scCO2 medium (20).…”

“…The green chemistry techniques gain importance day by day due to their use as an alternative solvent. Especially, supercritical fluids (SCF) have been used in various techniques such as organic synthesis, extraction, cosmetics, energy, food, materials, pharmaceutics, chemistry, sterilization, formulation, impregnation, cleaning, waste treatment and deposition of metals on the solid materials (1,2). For the past two decades, the deposition process in the scCO2 environment has become a focus of interest for scientists and has made an important contribution to the preparation of catalysts, especially with green chemistry.…”

Green Preparation of Multiwalled Carbon Nanotubes Supported Pd and Cu Nanoparticles with Novel Vic-dioxime Metal Complexes

“…Supercritical fluids (SCF) has been used in various application areas such as extraction, cosmetics, sterilization, energy, pharmaceutics, chemistry, organic synthesis, formulation, impregnation, cleaning, food, materials, waste treatment and deposition of metals on the solid materials (1,8). The deposition in supercritical fluids has recently been receiving a growing interest for its use in preparing deposited catalysts.…”

9-(4-Hydroxybutyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione

“…The synthesis of hexahydro-1H-xanthene-1,8(2H)-diones is commonly performed by the condensation of the appropriate aldehyde and dimedone or 1,3-cyclohexanedione under verious various conditions which include the use of alternative solvents [12][13][14][15], homogeneous [16,17], and heterogeneous [18][19][20] catalysts, and ultrasound- [21,22] or microwave-assisted [23] synthesis.…”