[EN] NEW GADOLINIUM CHELATE COMPOUNDS FOR USE IN MAGNETIC RESONANCE IMAGING<br/>[FR] NOUVEAUX COMPOSÉS DE CHÉLATES DE GADOLINIUM POUR UTILISATION DANS L'IMAGERIE PAR RÉSONANCE MAGNÉTIQUE
申请人:BAYER PHARMA AG
公开号:WO2016193190A1
公开(公告)日:2016-12-08
The present invention relates to a new class of high relaxivity extracellular gadolinium chelate complexes, to methods of preparing said compounds, and to the use of said compounds as MRI contrast agents.
Octafluoropentaerythrityltetramine (octafluoro-peta) and process for its preparation
申请人:The United States of America as represented by the Secretary of the Navy
公开号:US08008527B1
公开(公告)日:2011-08-30
A composition and method of manufacturing the same. Embodiments of an aspect of the invention relate to the formula C(CH2NF2)4 having the name octafluoropentaerythrityltetramine (octafluoro-PETA). In embodiments of another aspect generally relate to a method for manufacturing octafluoropentaerythrityltetramine (octafluoro-PETA) including, basifying pentaerythrityltetramine tetrahydrochloride in an aqueous solution with an aqueous alkali and treating with alkyl chloroformate for producing a tetraalkyl pentaerythrityltetra carbamate, extracting the compound into a nonaqueous solvent suitable for extraction from water and removing the solvent for providing a pure form of tetraethyl pentaerythrityltetracarbamate, bubbling elemental fluorine and/or mixtures of fluorine with an inert gas through tetraalkyl pentaerythrityltetracarbamate in a solvent suitable for direct fluorinations of protected amines until excess fluorine appears, and purifying the resultant octafluoropentaerythrityltetramine.
[EN] HIGH RELAXIVITY GADOLINIUM CHELATE COMPOUNDS FOR USE IN MAGNETIC RESONANCE IMAGING<br/>[FR] COMPOSÉS DE CHÉLATE DE GADOLINIUM À RELAXIVITÉ ÉLEVÉE POUR UTILISATION DANS L'IMAGERIE PAR RÉSONANCE MAGNÉTIQUE
申请人:BAYER PHARMA AG
公开号:WO2018096082A1
公开(公告)日:2018-05-31
The present invention relates to a new class of high relaxivity extracellular gadolinium chelate complexes, to methods of preparing said compounds, and to the use of said compounds as MRI contrast agents.
Novel GdDTPA-like complexes bearing differently branched, highly hydrophilic, gluconyl moieties were synthesized to obtain high relaxivity agents (∼20 mM−1 s−1 at 25 °C) over a wide range of imaging fields (0.5–3 T).
Contrast Agents Endowed with High Relaxivity for Use in Magnetic Resonance Imaging (Mri) Which Contain a Chelating Moiety with Polyhydroxylated Substituents
申请人:Aime Silvio
公开号:US20070258905A1
公开(公告)日:2007-11-08
The present invention relates to a new class of paramagnetic ion-based contrast agents of molecular weight lower than 3.5 kDa that show a pharmacokinetic profile analogous to that of the commonly used T1-general extravascular agents and that are further characterized by a higher relaxivity.