The effect of the N.N-diethylcarbamoyl indole protecting group on the reactivity of 2-(1,3-dithian-2-yl)indole 7 in front of a series of electrophiles, as well as the potential synthetic usefulness of the resulting 2,2-disubstituted dithianes is reported.

Chiral tetracyclic dasycarpidone-type compounds (αR, 1S, 5R)-4 and (αR, 1R, 5S)-16 have been synthesized from 2-(1,3-dithian-2-yl)indole 6 and (αR)-N-(β-hydroxy-α-phenylethyl)-Δ3-piperidein-2-one8 in three steps, following the methodology that we described recently.

20-Epidasycarpidone (10) and its N-benzyl analogue 9 have been synthesized via a conjugate addition of 2-(1,3-dithian-2-yl)indole (6) and 3-ethyl-Δ3-piperidein-2-ones 7 and 8, respectively. The transformation of 20-epidasycarpidone to 20-epiuleine (11) has been carried out as described in the l...

1,3-Dithian-2-yl-phenylmethanols undergo efficient rearrangement to afford 2-phenyl-6,7-dihydro-5H-1,4-dithiepines. The reactions were found to show remarkable variation in products formation that is dictated by the substituents on the aryl ring.

We have demonstrated that chiral 1-(1,3-dithian-2-yl)prop-2-en-1-ols as new scaffolds, obtained by enzyme-catalyzed kinetic resolution, undergo Suzuki-Miyaura cross-couplings and hydroformylation smoothly. Also, we have found that a 1,3-dithianyl group of the products can be removed without any ...

The synthesis of 3-(1-heptenylthio)-1, 2-propanediol has been achieved by the reaction of 1-ethylthio-1-heptene with lithium in ammonia followed by the addition of 1-bromo-2, 3-propanediol.

This study deals with the synthesis of tert-O-alkyl thiohydroxamates and their use as tert-alkoxyl radical precursors. tert-Alkoxyl radicals were applied in mechanistic studies to determine rate constants of (i) p-chlorocumyloxyl radical addition to bicyclo[2.2.1]heptene (k=1×107 M−1 s−1), (ii)...

Nitropyrenes are carcinogenic pollutants. Adduct formation following nitro-reduction is considered to be a major cause of nitropyrene-mediated DNA damage. We investigated the role of 1-nitrosopyrene, a metabolite of 1-nitropyrene, in causing oxidative DNA damage, using 32P-5′-end-labeled DNA. 1...

The hydrated basis carbonates of lanthanides and yttrium were prepared by precipitation from homogeneous solution via the hydrolysis of urea, without the addition of an auxiliary anion. Thermogravimetry, derivative thermogravimetry (TG-DTG), and differential thermal analysis (DTA) have been used...

Nanostructured ceria has been prepared in mild conditions by hydrolysis of the N,N-dibutylcarbamato complex of cerium(III), [Ce(O2CNBu2)3], obtained by lanthanide extraction from aqueous solution into heptane containing CO2 saturated NHBu2. In dependence of the hydrolysis conditions, cerium(III)...

Titrations of the Lehn cryptand [Ln⊂bpy.bpy.bpy]3+ complexes of both europium (III) and terbium (III) with fluoride and phosphate ions indicate that these anions displace water from the solvation sphere. In the case of the europium complex an enhancement of luminescence intensity is observed, wh...

The oxidation of Tb(III) in K2CO3-KOH solution was studied. The concentrations of terbium, carbonate and hydroxide ions are critical for generation and stabilization of Tb(IV). Redox titrations of Tb(IV) with the Fe(CN)64− ion and the analysis of Tb(IV) precipitates indicate that the Tb(IV) comp...

Incorporation of the 2-(2-hydroxyphenyl)-pyridine system into aza-crown systems produces novel ligands for lanthanide ions and can act as sensitising antennae for terbium (III) ions.

Dissolution of x-ray irradiated sodium chloride in aqueous solution produces a short-lived dynamic solid/solution interface which is able to raise the hydrated terbium(III) cation to its lowest excited state (5D4) and thus to induce the well-known 5D4→7F-multiplet peak emissions of terbium(III)...

Background and aimThe increase of the carbohydrate-deficient transferrin (CDT) as results of an heavy intake of alcohol for at least two weeks, is a well-known biochemical modification since the middle ‘70s. Notwithstanding the first commercial kit for the diagnosis of chronic alcohol abuse bas...

Solvation of europium ions in mixed aqueous-organic solvents was studied in the solutions of europium(III) triflate and chloride. Europium ions are preferentially solvated by organic solvent only in water-dimethylsulfoxide systems. In aqueous dimethylformamide and dimethylacetamide preferential ...

Discharge of liquid effluents from industries in an open environment causes severe pollution to natural water sources and carcinogenicity to aquatic animals. Present study reports the utilization of ion-imprinted polyvinylidene/1-butyl-3-methylimidazolium tetrafluoroborate (PVDF/RTIL) nanofibers...

Excess fluoride in water can be efficiently removed by lanthanum based material, however, different lanthanum species exhibited distinct fluoride removal capability. In this study, three typical lanthanum based nanoparticles denoted as L1, L2 and L3 in the form of La(OH)3, La2O3·nH2O and LaCO3O...

Plasma electrolytic oxidation coating was carried out in phosphate-based electrolyte embedded with different amounts of lanthanum nitrate (LN) on AZ31 magnesium alloy substrate in order to characterize the microstructure and protective properties of the prepared coatings. The SEM/elemental map r...

The potential of hydrothermal technology was utilized for the preparation of promising adsorbents in order to overcome the troubles of methemoglobinemia (blue baby syndrome) and eutrophication which is caused by excess nitrate (NO3−) and phosphate (PO43−) ions in water. Hence, in the present inv...