[EN] BIS TRIDENTATE W3O2 CLUSTERS FOR X-RAY IMAGING<br/>[FR] AGRÉGATS DE LIGANDS TRIDENTÉS BIS DE W3O2 POUR L'IMAGERIE PAR RAYONS X
申请人:BAYER IP GMBH
公开号:WO2013000970A1
公开(公告)日:2013-01-03
The present invention describes a new class of highly stable W3O2 Clusters, a method for their preparation, their use as X-ray contrast agents and the intermediates tri- or tetracarboxylic acids as desired tridentate ligand resources.
Synthesis of branched cores by poly-O-alkylation reaction under phase transfer conditions. A systematic study
作者:José M. Landeros、Hugo A. Silvestre、Patricia Guadarrama
DOI:10.1016/j.molstruc.2013.01.034
日期:2013.4
-alkylation reactions of pentaerythritol (PE) and 1,1,1- tris (hydroxymethyl)ethane (TME) by 1,4 Michael addition, underphasetransfer catalysis (PTC), considering the effect of: (1) the organophilicity of PTC (three different catalysts were tested), (2) PTC concentration (from catalytic to equimolar conditions), and (3) the regime of addition of reactants coexisting in the aqueous phase of the heterogeneous
The present invention describes a new class of highly stable W3O2 Clusters, a method for their preparation, their use as X-ray contrast agents and the intermediates tri- or tetracarboxylic acids as desired tridentate ligand resources.