A Ni-catalyzed cross-coupling reaction between aryl fluorides and dialkyl phosphonates [HP(O)(OR)2] (R = secondary alkyl groups) in the presence of potassium tert-butoxide as a base is reported. The reaction converted various aryl fluorides into the corresponding arylphosphonates even when electron-donating substituents were present on the aromatic ring. The combined experimental and computational
报道了在作为碱的叔丁醇钾存在下,芳基氟化物和膦酸二烷基酯[HP(O)(OR) 2 ](R =仲烷基)之间的Ni催化的交叉偶联反应。即使芳环上存在给电子取代基,该反应也将各种芳基氟化物转化为相应的芳基膦酸酯。结合实验和计算研究表明,Ni(0) 络合物与强给电子离子桥联的二聚亚磷酸酯配体系统 [P(OR) 2 O – K + ] 2螯合的 Ni-K +协同作用促进了周转-限制芳基氟化物的 C-F 键氧化加成。
THERMOPLASTIC POLYMER COMPOSITION
申请人:Kuraray Co., Ltd.
公开号:EP1411086A1
公开(公告)日:2004-04-21
The present invention provides a thermoplastic polymer composition mainly comprising a block copolymer prepared by extending, with a specific polyurethane component, the polymer chain of a block copolymer, which may be hydrogenated, having a polymer block of an aromatic vinyl compound and a polymer block of a conjugated diene. The thermoplastic polymer composition according to the present invention is excellent in handling properties and melt-moldability, because it shows non-tackiness. By using the thermoplastic polymer composition according to the present invention, a molded article having high qualities can be produced with good productivity.