An efficient and facile Pd(OCOCF3)2-catalyzed one-pot cascade protocol has been developed for the synthesis of multiple substituted pyrroles in good to excellent yields. Unlike the reported method starting from the 2-alkenal-1,3-carbonyl compounds, the process utilizes the less reactive 5-hexen-...

Fusarium verticillioides infects stored maize grains. In the present study, we first evaluated the effects of ten volatile organic compounds on F. verticillioides growth in culture medium. Subsequently, based on the antifungal activity obtained in the present study and the insecticidal effect ag...

α-Santonin, a sesquiterpene lactone isolated from Artemisia Santonica, possesses diverse bioactivities including antioxidant, anti-inflammation, immunosuppressive, anti-roundworm, anti-malaria, etc. However, its bioactivities are not satisfactory and need to be further optimized. Thus, many α-...

The biotransformation of sesquiterpenoids having an α,β-unsaturated carbonyl group, such as α-santonin (1), lancerodiol p-hydroxybenzoate (2), 8,9-dehydronootkatone (3), and nootkatone (4), with cultured suspension cells of Marchantia polymorpha was investigated. It was found that the CC doub...

Biotransformation of 6α-santonin (1) and 1,2-dihyro-α-santonin (2) by two fungal strains Acremonium chrysogenum (Cephalosporium chrysogenum) and Rhizomucor pusillus has been investigated for the first time. After 8 days of incubation of 1 by A. chrysogenum, four known metabolites including 1,2...

Heating of N-{2-[(R-amino)carbonyl]phenyl}prolinamides in triethyl orthoformate solution was found to give 6-R-5,6,6a,8,9,10,10a,11-octahydropyrrolo[1′,2′:3,4]imidazo[1,2-a]quinazoline-5,11-diones. Similar reaction of N-{2-[(R-amino)carbonyl]phenyl}thiazolidine-4-carboxamides afforded 6-R-5,6,...

Aldehyde dehydrogenase (ALDH) from yeast, in the presence of NAD+, oxidizes trans,trans-muconaldehyde (MUC) in a biphasic manner with apparent Km values of 0.48 and 3.2 μm and corresponding Vmax values of 604 and 1227 nmol/min/mg protein. Concentrations above 10 μm, trans,trans-muconaldehyde p...

Epoxy resins are very important and widely used thermosetting polymers that find many practical applications. Very often their properties can be effectively modified by an addition of reactive silanes, polysiloxanes, silsesquioxanes, silica, montmorillonite, and other fillers. This review consid...

Large-pore mesoporous ethane-silicas with trans-(1R,2R)-diaminocyclohexane protruding in the channel were synthesized by one-step condensation of 1,2-bis(trimethoxysilyl)ethane and N-[(triethoxysilyl)propyl]-(-)-(1R,2R)-diaminocyclohexane in acidic medium using P123 as template. Mesoporous mater...

Bifunctionalized organosilica hollow nanospheres with bridging ethane group and protruding amine group have been successfully synthesized through prehydrolysis strategy using 3-(aminopropyl)triethoxysilane (APTES) and 1,2-bis(trimethoxysilyl)ethane (BTME) as precursor and F127 (EO106PO70EO106) a...

trans-(1R,2R)-Diaminocyclohexane (DACH) functionalized mesoporous ethane-silicas with different porous structures were synthesized by addition of 1,3,5-trimethylbenzene (TMB) during co-condensation of 1,2-bis(trimethoxysilyl)ethane and N-[(triethoxysilyl)propyl]-(–)-(1R,2R)-diaminocyclohexane i...

In order to elucidate the effect of the polymerisation time on the morphology of styrene based monolithic support materials, continuous poly(1,2-bis(p-vinylphenyl))ethane (BVPE) rods were synthesised in 1.0 ml glass vials by thermally initiated free radical polymerisations of BVPE in the presenc...

A novel kind of hybrid monolith with well-defined mesopore structure was prepared based on sol-gel condensation of 1, 2-bis(trimethoxysilyl)ethane (BTME) and tetramethoxysilane. Compared with terminal organosiloxanes used for preparation of conventional hybrid monoliths, BTME, as an ethane-bridg...

A convenient one-pot synthesis pathway for hybrid mesoporous xerogels is presented. Hybrid xerogels with organic groups embedded in and anchored onto a framework were facilely prepared using 1,2-bis(trimethoxysilyl)-ethane (BTME) and polymethylhydrosiloxane (PMHS) as organosilica precursors in t...

Amine-functionalized, organic/inorganic hybrid mesostructured organosilica (BAFMO) materials have been synthesized and characterized from two bridged silsesquioxane precursors, 1,2-bis(triethoxysilyl)ethane (BTESE) and bis[(3-trimethoxysilyl)propyl]amine (BTMSPA). Mole ratios of BTESE ranged fro...

The organic–inorganic protective coatings for the aluminium alloy AA 2024-T3 were produced from a precursor 1,2-bis(trimethoxysilyl)ethane. The structural properties of the coatings were analysed using SEM, EDS, contact angles and IR reflection–absorption at the near grazing incidence angle co...

N,O-Bistrimethylsilyl-4-aminobenzoic acid was selectively acylated at the amino group with 4-acetoxy-3-methoxybenzoyl chloride. The resulting dimer with silylated carboxyl group was polycondensed in situ at 300 or 350°C using Marlotherm-S as an inert reaction medium. In an alternative approach ...

Several potassium and sodium salts of monobasic, dibasic and tribasic organic acids, and sodium and calcium salts of fatty acids were directly silylated by Tri-Sil, a commercially available silylating reagent composed of a mixture of hexamethyldisilazane and trimetylchlorosilane in pyridine. The...

The fragmentation patterns and quantitation possibilities of three anthocyanidins (pelargonidin, cyanidin, malvidin), one flavonol (quercetin), two flavones (apigenin, luteolin) and two flavanones (naringenin, hesperetin) have been investigated as trimethylsilyl and as trimethylsilyl (oxime) der...

Allelochemical compounds were detected in leaves and inflorescences of Sambucus nigra L. by means of GC-EIMS. The identified compounds were characterized by their mass spectra and relative retention times as their trimethylsilyl derivatives. The pheromone L-isoleucine methyl ester extracted from...