S-metolachlor (SMOC) and terbuthylazine (TBA) are herbicides that commonly appear as active ingredients (a.i.) in the composition of plant protection products. In a previous work, experimental bioassays were performed using those chemicals to find suitable molecular biomarkers to assess its toxi...

Mandelic acid (MA) is generally used as a biomarker of the exposure of styrene, which is classified as a class of hazardous environmental pollutants, and also used as an important chiral intermediate in pharmaceutical industry. The previous studies have found the excretion of phenylglyoxylic aci...

The OH proton chemical shifts of methanol referred to the CH3 proton in the methanol — benzene-d6 system have been measured from room temperature up to the supercritical region. MD simulations have also been performed at the same composition as experiment at 575 K. The chemical shift results in...

The reactions of ground-state boron atoms, B(2Pj), with benzene, C6H6(X1A1g), and deuterated benzene C6D6(X1A1g), were studied in crossed molecular beam experiments. The reactions were indirect and involved an addition of atomic boron to one carbon atom of benzene following isomerization of the ...

The reactions of [(arene)MCl2]2 dimers with the 1,4-bis(2-pyridine carboxamido)benzene (H2L) have been reported here with the formulations as [(arene)MCl(HL)] {where, arene = p-cymene, M = Ru (1), arene = Cp*, M = Rh (2) and Ir (3)}and [{(arene)MCl}2L] {where, arene = p-cymene, M = Ru (4), arene...

Iron tetrasulfophthalocyanine (FePcS) supported catalyst was prepared by covalent grafting onto amino-modified silica by a novel practical one-pot method using activation of sulfonate groups of FePcS by triphenylphosphine triflate. FePcS–SiO2 in combination with tBuOOH behaved as an efficient c...

The stereoisomers of five 1-(phenylethylamino)methyl-2-naphthol analogs or 1-(naphthylethylamino)methyl-2-naphthol analogs containing two chiral centers were directly separated on chiral stationary phases containing the chiral selectors cellulose tris-(3,5-dimethylphenyl) carbamate (Lux Cellulos...

The catalytic oxidation of 2-methyl-1-naphthol (MNL) to 2-methyl-1,4-naphthoquinone (MNQ; menadione; vitamin K3) using aqueous H2O2 as an oxidant and hydrothermally stable mesoporous mesophase titanium silicates Ti-MMM-2 as catalysts has been studied. The effects of mesopore diameter, temperatur...

Two synthetic routes, via 2-methyl-1-tetralone and 1-naphthol were tested to produce 2-methyl-1-naphthol from 1-tetralone. The vapour-phase catalytic reactions of methylation and dehydrogenation proceed with high conversion and selectivity (90–97%) over modified iron oxide and palladium support...

This paper examines the reactivity of catalysts based on niobium oxide dispersed in silica, for the oxidation of 2-methyl-1-naphthol to 2-methyl-1,4-naphthoquinone (menadione) with aqueous hydrogen peroxide. The catalytic performance is affected by the hydroperoxide concentration, and by the mod...

The direct three component reaction via condensation of aldehydes, 2-naphthol and piperidine or acetamide to generate 1-(aryl(piperidin-1-yl)methyl)naphthalene-2-ol and N-((2-hydroxy naphthalene-1-yl)(aryl)methyl)acetamide derivatives has been carried out over Fe3O4 magnetic nanoparticle with hi...

Wastewater containing 1-amino-2-naphthol-4-sulfonic acid (ANS) is mainly derived from the dye production process, causing serious environmental problems. In this work, extraction of ANS from wastewater was carried out using trioctylamine (TOA) under condition of methyl isobutyl ketone (MIBK) as ...

The 1H{15N} heteronuclear correlation and 15N cross-polarized magic angle spinning NMR spectra of purine (1) were measured. The Zn(II) chloride complexes with 1, 7-methylpurine (2) and 9-methylpurine (3) were synthesised and studied by analytical methods, far-IR and 15N NMR. The formulae of ZnL2...

The first total synthesis and structural elucidation of cryptomoscatone D1, and a novel synthetic approach for cryptomoscatone D2 were achieved in 30% and 29% overall yield, respectively. The synthesis relied on the use of a key Mukaiyama aldol reaction followed by a diastereoselective carbonyl ...

Indole-3-acetic acid (IAA) is an important plant hormone, and many types of bacteria interact with plants by producing or degrading IAA in the rhizosphere. The iac (indole-3-acetic acid catabolism) gene locus in Acinetobacter baumannii ATCC19606 was previously associated with IAA degradative cap...

Reactions of arylhydrazines (phenyl, 2-nitrophenyl, 4-nitrophenyl, 2,4-dinitrophenyl, pentafluorophenyl, 4-trifluoromethyl-2,3,5,6-tetrafluorophenylhydrazine or 4,4′-dihydrazinooctafluorobiphenyl) with perfluoro-2-methyl-2-pentene in the presence of triethylamine have effectively produced 1-ary...

N,N-dimethylhydrazones of aldehydes can be efficiently oxidized in a catalytic way by hydrogen peroxide associated with methyltrioxorhenium (MTO) as the catalyst to give nitriles. Elimination of dimethylhydroxylamine that is further oxidized to N-methyl-N-methylene N-oxide takes place. This nitr...

Reaction of 3-amino-6-methyl-4-phenylpyridin-2(1H)-one with aromatic aldehydes afforded the corresponding Schiff bases, the reduction of which with sodium borohydride led to the formation of 3-(arylmethyl)-6-methyl-4-phenylpyridin-2(1H)-ones. Acylation of 3-amino-6-methyl-4-phenylpyridin-2(1H)-o...

Conformational analysis was carried out for N-(5-aminopyridin-2-yl)acetamide (APA) molecule. The most stable, optimized structure was predicted by the density functional theory calculations using the B3LYP functional with cc-pVQZ basis set. The optimized structural parameters and vibrational fre...

Aiming to develop promising ALK inhibitors, two series of N2-(2-alkyoxy-6-aliphatic aminopyridin-3-yl)-2,4-diaminepyrimidine derivatives (22a-x and 23a-d) were designed according to scaffold hopping and bioisosterism principles. All compounds were efficiently synthesized by concise reactions and...