Chromatographic, Spectrometric and NMR Characterization of a New Set of Glucuronic Acid Esters Synthesized by Lipase

An enzymatic synthesis was developed on a new set of D-glucuronic acid esters and particularly the tetradecyl-D-glucopyranosiduronate also named tetradecyl D-glucuronate. Chromatographic analyses revealed the presence of the ester as a mixture of anomeric forms for carbon chain lengths superior to 12. TOF/MS and MS/MS studies confirmed the synthesis of glucuronic acid ester. The NMR study also confirmed the structure of glucuronic acid esters and clearly revealed an anomeric (α/β) ratio equivalent to 3/

Design and synthesis of an artificial catalyst inspired by carbonic anhydrase

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Mass Spectrometric Studies of Elusive Molecules that Contain an N+-X- Bond

peer reviewedThis review will be concerned with the gas phase chemistry of 1,2- and 1,3-dipolar systems that contain a carbon-nitrogen bond. Although most of these compounds are stable molecules under normal conditions, certain congeners are reactive species that can

Ion-Molecule Reaction of Pyridine with CS3 Radical Cations: Experimental Evidence for the Production of Pyridine N-thioxide Distonic Ions

peer reviewedChemical ionization of pyridine using carbon disulphide as the reagent gas leads to the formation of new distonic ions, pyridine N-thioxide radical cations, 2+.. The origin of these ions is unambiguously attributed to the reaction of CS3+. ions with neut

Elucidation of molecular diversity and body distribution of saponins in the sea cucumber Holothuria forskali (Echinodermata) by mass spectrometry

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Qualitative and quantitative study of Saponin contents of five sea cucumbers of the Indian Ocean

peer reviewedTo avoid predation, holothuroids produce feeding-deterrent molecules in their body wall and viscera, the so-called saponins. Five tropical sea cucumber species of the family Holothuriidae were investigated in order to study their saponin content in two d

Pyridine N-Selenide Radical Cations: Synthesis, Characterization, Neutralization and Ion-molecule Reactions in the Gas Phase

peer reviewedCyanogen N-selenide radical cations, NCCNSe·+, react efficiently with neutral pyridine producing the elusive pyridine N-selenide radical cations. The structure of these new distonic ions has been established by high energy collisional activation (CA), ne

Peptoids as Promising Azobenzene Support for the Chemical Storage of Solar Energy

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