Efficient Syntheses of N-Alkyl-3-hydroxy-2-methyl-4(1H)-pyridinones From Carbohydrate Precursors
摘要:
N-alkyl-3-hydroxy-2-methyl-4(1H)-pyridinohes can be synthesised in reasonable yield from either 1-(3-hydroxy-2-furanyl)ethanone or O-galactosylisomaltol. Since these carbohydrate precursors can be produced from the disaccharide, alpha-D-lactose, a simple and inexpensive transformation into pyridinones is possible.
Synthesis and chromatographic properties of isomeric O-β-d-galactopyranosyl-d-galactoses, and of diastereo-isomers of 3,4-O- and 4,6-O-(1-carboxyethylidene)-d-galactose
α-Galactobiosyl units: thermodynamics and kinetics of their formation by transglycosylations catalysed by the GH36 α-galactosidase from Thermotoga maritima
作者:Anna S. Borisova、Dina R. Ivanen、Kirill S. Bobrov、Elena V. Eneyskaya、Georgy N. Rychkov、Mats Sandgren、Anna A. Kulminskaya、Michael L. Sinnott、Konstantin A. Shabalin
DOI:10.1016/j.carres.2014.11.003
日期:2015.1
a limiting factor for application of the enzyme in the directed synthesis of oligogalactosides. However, this property can be used as a convenient tool in studies of thermodynamics of a glycosidic bond. Here, a novel approach to energy difference estimation is suggested. Both transglycosylation and hydrolysis of three types of galactosidic linkages were investigated using total kinetics of formation
Präparat zur Wirkstoffapplikation in Kleinsttröpfchenform
申请人:Cevc, Gregor, Prof. Dr.
公开号:EP0475160A1
公开(公告)日:1992-03-18
Die Erfindung betrifft ein Präparat zur Applikation von Wirkstoffen in Form kleinster, insbesondere mit einer membranartigen Hülle aus einer oder wenigen Lagen amphiphiler Moleküle bzw. mit einer amphiphilen Trägersubstanz versehenen Flüssigkeitströpfchen, insbesondere zum Transport des Wirkstoffes in und durch natürliche Barrieren und Konstriktionen wie Häute und dergleichen. Das Präparat weist einen Gehalt einer randaktiven Substanz auf, der bis zu 99 Mol.-% des Gehaltes dieser Substanz entspricht, durch den der Solubilisierungspunkt der Tröpfchen erreicht wird. Das Präparat eignet sich zur nichtinvasiven Verabreichung von Antidiabetica, insbesondere von Insulin. Die Erfindung betrifft außerdem ein Verfahren zur Herstellung solcher Präparate.
A nanoscale self-aggregate having a unique high order structure was obtained by preparing a nanoscale self-aggregate having an oligosaccharide in the saccharide chain.
The present invention is a nanoscale self-aggregate comprising an O-glycoside type oligolipid having a structure represented by the general formula (1) shown below.
(In the formula, G represents an oligosaccharide radical composed from two to thirty bonded monosaccharides, and R represents a hydrocarbon group containing six to twenty-five carbon atoms.) This nanoscale self-aggregate assumes the shape of micro double helical fiber shaped aggregates, micro helical disk shaped aggregates, nanoscale tubular aggregates and microfiber shaped aggregates.
Protein particles for therapeutic and diagnostic use
申请人:——
公开号:US20020142046A1
公开(公告)日:2002-10-03
Albumin particles in the nanometer and micrometer size range in an aqueous suspension are rendered stable against resolubilization without the aid of a cross-linking agent and witout denaturation, by the incorporation of a stabilizing agent in the particle composition. Stabilizing agents disclosed include reducing agents, oxdizing agents, hydrogen-accepting molecules, high molecular weight polymers, and sulfur-containing ring compounds. Also disclosed are fibrinogen-coated particles, cross-linked or non-cross-linked, and their use as co-aggregants with platelets and with themselves for purposes of shortening bleeding time and enhancing the effect of thrombin.
A nanoscale self-aggregate having a unique high order structure comprises an O-glycoside type oligolipid having a structure represented by the general formula (1)
1
wherein G represents an oligosaccharide radical composed from two to thirty bonded monosaccharides, and R represents a hydrocarbon group containing six to twenty-five carbon atoms. This nanoscale self-aggregate assumes the shape of micro double helical fiber shaped aggregates, micro helical disk shaped aggregates, nanoscale tubular aggregates and microfiber shaped aggregates.