Reaction of the readily accessible dimethyloctadienyl ruthenium chloride [(μ-η3:η3-C10H16)RuCl2]2 (1) with 1,3,5,5-tetramethylcyclohexadiene and arenes in the presence of TlPF6 gives cyclohexadienyl ruthenium arene complexes [(η5-C6H3Me4)Ru(η6-arene)]+ in ca. 50% yield (arene = benzene, nap...
The radiation-induced degradation of 2-chloroanisole (2-ClAn) is investigated under various experimental conditions in neutral aqueous media as a function of absorbed radiation dose. The initial yields (Gi-values) of substrate degradation as well as those of the resulting major products were det...
1- and 2-Butene pyrolysis experiments were performed using a tubular flow reactor at an absolute pressure of ∼0.82 atm over a temperature range of 535–810 °C with residence times ranging from ∼0.5–∼2.4 s. The initial concentration of the fuel ranged from 5 to 50 mol%. These data were compa...
In this study we examine the application of a factor analysis technique for datasets recorded by the chemical ionization instrument Proton Transfer Reaction - Time-of-Flight - Mass Spectrometer (PTR-ToF-MS). Numerical simulations were carried out to test and optimize the performance of the facto...
Green synthesis of verbenol was achieved via allylic oxidation of α-pinene with a peroxide agent in the presence of a peroxidase enzyme in a biphasic aqueous-organic system. The aqueous part contained the enzyme together with the oxidation agent, while the organic part was the reservoir of α-p...
We propose the use of thermal-desorption dichloromethane-induced low-pressure photoionization mass spectrometry (TD-CH2Cl2-induced LPPI-MS) via a laboratory-built krypton vacuum ultraviolet lamp for the real-time analysis of α-pinene secondary organic aerosol (αP-SOA). Using this technology, t...
The catalytic performance of methyltrioxorhenium(VII) (MTO) has been investigated for the first time in the isomerization of α-pinene oxide (PinOx) into campholenic aldehyde (CPA). The high isomerization activity of MTO is coupled with high selectivity to CPA: CPA yield of up to 87% (100% conve...
Bio-based polycarbonate, which was synthesized by terpolymerization of carbon dioxide (CO2) and epoxides from natural resources, is attractive development direction in polymer fields. Bio-based polycarbonate, however, is difficult to synthesize, and it’s also accompanied by inferior thermal pro...
Few types of ZSM-5 based micro-mesoporous materials obtained via a dual template method, steam-assisted conversion and dual-functional templating were evaluated in α-pinene oxide isomerization. Complete conversion and the highest selectivity towards trans-carveol (ca. 40–43%) were achieved ove...
Isomerization of α-pinene oxide was studied at 20–50 °C in the presence of commercial montmorillonites K-10 and K-30, acid-treated illite clay as well as synthetic aluminosilicate AS-36 using cyclohexane as a solvent. The catalysts were characterized by XRD, XRF, FTIR, MAS NMR, thermal analys...
The isomerization of α-pinene oxide in the presence of Cs2.5H0.5PW12O40 (CsPW) heteropolysalt as solid acid catalyst is reported. The reactions were performed in various solvents, which allowed to obtain trans-carveol, trans-sobrerol and pinol in 60–80% yield each, which exceed the yields repo...
In this paper, we report the assembling of libraries of β-arylated short/medium/long chain-based non-α-amino acid (aminoalkanoic acid) derivatives via the Pd(II)-catalyzed, bidentate directing group 8-aminoquinoline-aided sp3 β-C-H activation/arylation method. Short/medium chain-based unnatur...
A method for the detection and quantification of hydroxyl and epoxy arachidonic acid (AA) metabolites in human plasma was developed using liquid-liquid extraction, phospholipid saponification followed by derivatization of the acid moiety and liquid chromatographic tandem mass spectrometric detec...
A high-yielding procedure for the synthesis of 5-aryl-4-(arylethynyl)pyrimidines from easily available 2-aryl-3-hydroxyacrylates is reported. These pyrimidines readily undergo cyclization in strong Brønsted acids and, depending on the substitution in alkynylpyrimidines and the water content of t...
Xanthomegnin and viomellein obtained from a toxigenic isolate of Penicillium viridicatum were fed to weanling male Swiss mice at dietary concentrations of 448 and 456 mg/kg of feed, respectively. Gross alterations included jaundice, greenish discoloration of the kidney, and small foci of discolo...
One of the three pigments isolated in crystalline form from the mycelium of the dermatophyte, Trichophyton rubrum, has been shown to be identical with the pigment, xanthomegnin, previously isolated from T. megnini. Several additional derivatives of the compound are reported.
SummaryWheat seed was adjusted to 18, 20, 22, 24 and 26% moisture content (m.c.), and stored for 240 days at 4 or 10°C following inoculation with a strain of Penicillium viridicatum producing the toxins, xanthomegnin (XA), viomellein (VIO), and brevianamide A (BA). Wheat kernels were not steril...
Preliminary separations of xanthomegnin and viomellein demonstrated some irreversible binding to silica. However, reversed-phase high-performance liquid chromatographic procedures on C18 columns showed that binding could be minimized by the inclusion of sodium dodecyl sulfate in the mobile phase...
Penicillium freii (Lund and Frisvad 1994) mutants deficient in the synthesis of xanthomegnin were isolated. In vitro translated mRNA populations from selected radiation induced mutants and naturally occurring P. freii strains not able to produce xanthomegnin were examined by 2-dimensional polyac...
The myotoxins xanthomegnin and viridicatumtoxin were not teratogenic when administered orally to pregnant ICR mice during the 8–12th and 8–13th days of gestation, respectively. Viridicatumtoxin produced high mortality in mice given 200, 250 or 350 mgkg of body weight.
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