Zirconium and hafnium complexes based on 2-aryl-8-arylaminoquinoline ligands: synthesis, molecular structure, and catalytic performance in ethylene copolymerization
METHOD FOR INHIBITING TAU PROTEIN AGGREGATION AND TREATMENT OF ALZHEIMER'S DISEASE WITH A COMPOUND DERIVED FROM QUINOLINE
申请人:Universidad De Chile
公开号:EP2567954A1
公开(公告)日:2013-03-13
Method for inhibiting tau protein aggregation and treatment of Alzheimer's disease by administering a quinoline derivative compound of formula
wherein R2 is 2-(4-aminophenyl) or 2-(4-methylphenyl) and R6 is methyl as an inhibitor of the tau protein aggregation.
通过施用式喹啉衍生物化合物抑制 tau 蛋白聚集和治疗阿尔茨海默病的方法
其中 R2 为 2-(4-氨基苯基)或 2-(4-甲基苯基),R6 为甲基,作为 tau 蛋白聚集的抑制剂。
Zirconium and hafnium complexes based on 2-aryl-8-arylaminoquinoline ligands: synthesis, molecular structure, and catalytic performance in ethylene copolymerization
作者:Ilya E. Nifant'ev、Pavel V. Ivchenko、Vladimir V. Bagrov、Sandor M. Nagy、Linda N. Winslow、Jean A. Merrick-Mack、Shahram Mihan、Andrei V. Churakov
DOI:10.1039/c2dt31856c
日期:——
A general and efficient approach toward new zirconium and hafnium complexes based on 2-aryl-8-arylaminoquinoline ligands was developed. These precursors, when activated with MAO/borate cocatalyst and supported on silica, result in active olefin polymerization catalysts. The ethylene copolymers produced under industrially relevant conditions show very high molecular weights and unique microstructures defined by the multisite nature of the catalyst. A site-diversification mechanism is proposed to explain the presence of at least five individual sites, as deduced from 3D-TREF analysis of ethylene–butene copolymers.
8-amino-2-arylquinoline ligands (1–6) were synthesized and reacted with CH3CrCl2(thf)3. Under these conditions a CH bond of the 2-aryl substituent is metalated, leading to organochromium complexes with monoanionic tridentateligands (8–13). The presence of a chromium–carbon σ bond in these complexes has been established by X-ray analysis. Furthermore, 8-(piperidin-1-yl)quinoline (14) was used as neutral bidentate