A new method has been developed for the oxidative amidation of dibenzylamines to construct N-benzylbenzamides via C–H bond activation. This new method allows for the formation of two amide products from a single dibenzylamine starting material in good yields using CuBr as a catalyst and diaceto...

In this study, octachlorocyclotetraphosphazene, (1) and mono-spiro-1,3-propanedioxycyclotetraphosphazene, (2) were reacted with dibenzylamine to obtain cyclotetraphosphazenes having one and two stereogenic centres and to investigate the stereogenic properties of them. The reactions of compound 1...

(Benzylthio)acetic acid (Hbta) was synthesized with 78% yield from benzyl chloride and thiourea as substrates. Well-shaped crystals of Hbta were grown by slow solvent evaporation technique from pure methanol. The compound was investigated by single-crystal X-ray and powder diffraction techniques...

The DFT studies were carried out with the B3LYP method utilizing the 6-31G and 6-311++G(d,p) basis sets depending on whether the aim of calculations was to gain the geometry at equilibrium, or to calculate the optimized molecular structure of (benzylthio)acetic acid (Hbta) in the forms of monome...

Phenethyl ester is an important contributors to food, drinks, cosmetics and perfumery. Phenethyl acetate was synthesized enzymatically from phenethyl alcohol with acyl donors catalyzed by Novozym 435 from Candida antarctica lipase B. Through acyl donor screening, acetic anhydride and vinyl aceta...

In this study a polymer inclusion membrane (PIM) for the extraction and separation of uranium (UO22+) from acidic sulfate solutions is detailed. Poly(vinyl chloride) (PVC) based PIMs containing the following commercial extractants were screened for their ability to extract uranium: Alamine 336, ...

To date, poly(vinyl chloride) (PVC) is the most used polymer in the design of ion selective electrode (ISE) membranes. This paper is focused on the use of sulfonated poly(ether ether ketone) (SPEEK) as an alternative material to PVC for the design of ISEs. SPEEK of the desired degree of sulfonat...

Di-(2-ethylhexyl) phosphoric acid (D2EHPA) is a commonly used extraction reagent for the separation of uranium from aqueous solutions. Previous work showed the suitability of a polymer inclusion membrane (PIM) based on D2EHPA and poly(vinyl chloride) (PVC) for the extraction and transport of ura...

The photochemical stability of copolymers of 2,2,2-trifluoroethyl methacrylate with butyl vinyl ether (TFEMA/BVE) and of methyl α-trifluoromethyl acrylate with 2-ethylhexyl vinyl ether, has been investigated under artificial solar light irradiation. In both copolymers, as well as in a reference...

Plastic products are closely intertwined with modern life. Some plasticizers used in making plastics, such as phthalates, are reported to be endocrine-disrupting chemicals. Plasticizers can be released into the environment, and health risks related to plasticizer exposure have been reported. In ...

Cations were generally ineffective in stimulating succinate transport in a succinate dehydrogenase mutant of Bacillus subtilis unless accompanied by polyvalent anions; phosphate and sulfate being particularly active. The Km values for the phosphate or sulfate requirement were approx. 3 mM.Biphas...

Different (co)polyesters, poly(1,4-butylene succinate-ran-2,3-butylene succinate) (PBB’S), were enzymatically copolymerized at different 1,4-butanediol (1,4-BDO)/2,3-butanediol (2,3-BDO) molar ratios, with immobilized Candida antarctica lipase B (CALB). The synthesized macromolecular architectu...

In this work, the new approach to synthesis of benzyl cinnamate by enzymatic esterification of cinnamic acid with benzyl alcohol is optimized by response surface methodology. The effects of various reaction conditions, including temperature, enzyme loading, substrate molar ratio of benzyl alcoho...

Derivatives 2a–15a of (R,R)-tartaric acid (1a) with all combinations of methyl ester, amide, N-methylamide and N,N-dimethylamide groups, as well as the corresponding O,O′-dibenzoyl derivatives 1b–15b and nitriles 16–18 have been synthesized. Their conformations have been studied by the NMR a...

A series of final twelve propanoyloxy derivatives of 5β-cholan-24-oic acid (O-propanoyl derivatives of cholic acid) as potential drug absorption modifiers (skin penetration enhancers, intestinal absorption promoters) was generated by multistep synthesis. Structure confirmation of all generated ...

We have chemically synthesized two water-soluble forms of tocopherol succinate linked via an ester bond to hexaethylene glycol and dodecaethylene glycol. The self-assembly structure of the former in water is vesicular, whereas the latter forms elongated micelles. We treated Caco-2 cells with the...

The insulinotropic action of several new esters of succinic acid was assessed in isolated rat islets incubated in the presence of 7mM D-glucose. An efficient secretory response was observed with the monobenzyl, monoisopropyl, monoallyl, monopropyl, monoethyl, monobutyl, dibutyl, dipropyl and dia...

A series of 1,3-disubstituted 2-iminobenzimidazolines as well as a number of their tautomeric analogs were synthesized. The synthesized compounds were tested for their cytotoxicity against MDCK cells and for inhibiting activity against influenza virus A/California/07/09 (H1N1)pdm09. Based on the...

A novel catalytic system based on palladium supported on chitosan was synthesized adopting a MW-assisted process. This synthetic approach results efficient under mild reaction conditions and very short microwave irradiation times. The prepared catalyst was employed in the hydrogenation of ethyl ...

In this paper, Lipozyme TLIM-catalyzed synthesis of ethyl cinnamate through esterification of cinnamic acid with ethanol was studied. In order to increase the yield of ethyl cinnamate, several media, including acetone, isooctane, DMSO and solvent-free medium, were investigated in this reaction. ...