In the context of a proposed total synthesis of lankacidins, the synthesis of 4-(2-iodo-alkenyl)azetidinones and their participation in Stille coupling reactions have been investigated. 1-tert-Butyldimethylsilyl-4-(2-iodoethenyl)azetidinone was found to undergo a Stille coupling reaction with a ...

A structure-activity study was performed to investigate the mechanism of neurotoxicity induced in rats by treatment with p-bromophenylacetylurea (BPAU). Phenylacetylurea and 7 derivatives were tested for their ability to induce hindlimb weakness after twice weekly administration in doses of 200 ...

The effect of Re-addition to Pt/TiO2 catalysts for the hydrogenation of carboxylic acids and esters to their corresponding alcohols was investigated. The highest catalytic activity was observed for the materials with Pt:Re molar ratio of 1:2, which allowed for a complete conversion of hexanoic a...

Generation and screening of oxime libraries by competitive MS Binding Assays represents a powerful tool for the identification of new compounds, with affinity to mGAT1, the most abundant plasma membrane bound GABA transporter in the CNS. By screening a guvacine derived oxime library, new potent ...

Aiming to explore novel BRAFV600E and VEGFR-2 dual inhibitors, a series of 1H-pyrazolo[3,4-d]pyrimidine derivatives were designed, synthesized and biologically evaluated in this study. Most of the synthesized 1H-pyrazolo[3,4-d]pyrimidine compounds displayed moderate to high potent activity in bo...

P-Stereogenic oxazaphosphorine compounds of the form 4 have not previously been reported as asymmetric ligands for metal-catalyzed reactions. In an effort to explore the behavior of such oxazaphosphorine ligands, monomeric oxazaphosphorine borane 9 and dimeric oxazaphosphorine boranes 25 and 26 ...

A recently identified organic nonlinear optical material, 4–Amino–(1–methylphenyl) pyridinium bromide (4A1MPB) was synthesized and attempts were made to grow good quality single crystal by slow evaporation solution growth technique which crystallizes in orthorhombic system with a non–centros...

In the last two decades, trans-sialidase of Trypanosoma cruzi (TcTS) has been an important pharmacological target for developing new anti-Chagas agents. In a continuous effort to discover new potential TcTS inhibitors, 3-amino-3-arylpropionic acid derivatives (series A) and novel phthaloyl deriv...

The present paper is concerned with the synthesis and molecular structure investigation of two new benzoic acid derivatives having trimethylsilyl tails, 4-((trimethylsilyl)methoxy) and 4-(3-(trimethylsilyl)propoxy)benzoic acids. The structures of the novel compounds have been confirmed by X-ray ...

The molecular structure and conformational composition of 2-bromo-3-chloro-1-propene have been determined by gas-phase electron diffraction at nozzle temperatures of 20, 90 and 187°C. There is a mixture of two conformers in the gas phase with the halogen atoms anti or gauche to each other. The ...

The infrared spectra of 2-chloro-3-fluoro- and 2-bromo-3-fluoro-1-propene as vapours and liquids were recorded in the region 4000–4050 cm−1. Additional spectra of the amorphous and crystalline solids at −170 °C and of the liquids in polar and non-polar solvents were recorded between 4000 and 2...

The infrared spectra of 2-bromo-3-chloro-1-propene have been recorded in the region 4000-50 cm−1 for the gaseous, liquid, amorphous and annealed solid at 90 K. Raman spectra of the neat liquid, as a solute in polar/non-polar solvents, and as an amorphous and crystalline solid at 90 K have also b...

Direct and indirect high-performance liquid chromatographic methods were developed for the enantioseparation of β-amino acids (β-substituted-β-alanines). Direct separation involved the application of chiral columns: Crownpak CR(+), Chirobiotic T and Chirobiotic R. Indirect separation was base...

EI mass fragmentation of the 1,2-bis(6-methylpyridin-2-yl)ethane-1,2-dione and 1-(pyridin-2-yl)-2-(6-methylpyridin-2-yl)ethane-1,2-dione radical cations gave rise to a sequence of unexpected composite ion peaks. The molecular ion m/z 240 gives mass measurements of metastable ions at m/z 212 and ...

We report structure-activity relationships of 1-arylsulfonyl indoline based benzamides. The benzamide (9) exhibits striking tubulin inhibition with an IC50 value of 1.1 μM, better than that of combretastain A-4 (3), and substantial antiproliferative activity against a variety of cancer cells, i...

The natural product oenothein B (OeB), a dimeric macrocyclic ellagitannin, has a wide range of biological activities, such as antioxidant, anti-inflammatory, anti-viral, antifungal, and antitumor. However, investigations concerning its genotoxicity have not been carried out. This study assessed ...

Several plant extracts, including certain polyphenols, prime innate lymphocytes and enhance responses to secondary stimuli. Oenothein B, a polyphenol isolated from Epilobium angustifolium and other plant sources, enhances IFNγ production by both bovine and human NK cells and T cells, alone and ...

Oenothein B has a wide range of biological activities. The present study probed into the underlying mechanism on how Oenothein B inhibits the proliferation of a lung cancer line A549. Our results showed that Oenothein B effectively inhibited the proliferation of A549 cells by inducing apoptosis ...

To date, there is no established treatment for heart failure with preserved ejection fraction (HFpEF). Dipeptidyl peptidase-IV (DPP-IV) inhibitors reportedly have improved not only diabetes mellitus but also heart failure with systolic dysfunction in experimental models. We investigated the effe...

Up to 35% of (R)-methyl 2-methylbutanoate (M2MB) was observed in a beverage fermented with shiitake. As M2MB naturally occurs typically in high excesses of the (S)-enantiomer, the origin of the (R)-ester was elucidated by stable isotope labeled precursor-feeding studies. (R)-2-Methylbutanoic aci...