合成了一系列的单阴离子,双齿的2-苯胺基甲基吡啶配体,并用于制备双(螯合物)Zr(IV)和Hf(IV)双(二甲基酰胺基)配合物。通过NMR光谱和元素分析对所有配合物进行表征。配合物的溶液结构或多或少是流动性的,这取决于配体上的取代基。测试了配合物与不同的活化剂一起作为乙烯和丙烯聚合的催化剂。使用Al i Bu 2 H –甲基铝氧烷作为助催化剂可产生出具有高活性的高分子量聚乙烯的催化剂,但仅产生立体不规则和区域规则性较差的聚丙烯。
合成了一系列的单阴离子,双齿的2-苯胺基甲基吡啶配体,并用于制备双(螯合物)Zr(IV)和Hf(IV)双(二甲基酰胺基)配合物。通过NMR光谱和元素分析对所有配合物进行表征。配合物的溶液结构或多或少是流动性的,这取决于配体上的取代基。测试了配合物与不同的活化剂一起作为乙烯和丙烯聚合的催化剂。使用Al i Bu 2 H –甲基铝氧烷作为助催化剂可产生出具有高活性的高分子量聚乙烯的催化剂,但仅产生立体不规则和区域规则性较差的聚丙烯。
BF<sub>3</sub>·Et<sub>2</sub>O as a metal-free catalyst for direct reductive amination of aldehydes with amines using formic acid as a reductant
作者:Zhenli Luo、Yixiao Pan、Zhen Yao、Ji Yang、Xin Zhang、Xintong Liu、Lijin Xu、Qing-Hua Fan
DOI:10.1039/d1gc01468d
日期:——
direct reductive amination of aldehydes with amines using formic acid as a reductant under the catalysis of inexpensive BF3·Et2O has been developed. A wide range of primary and secondary amines and diversely substitutedaldehydes are compatible with this transformation, allowing facile access to various secondary and tertiary amines in high yields with wide functional group tolerance. Moreover, the
Group 4 metal bis(chelate) complexes of 2-anilidomethylpyridine ligands: Synthesis and catalytic activity for olefin polymerization
作者:Liana Annunziata、Gang Li、Claudio Pellecchia
DOI:10.1016/j.molcata.2011.01.004
日期:2011.3
ligands were synthesized and used to prepare bis(chelate) Zr(IV) and Hf(IV) bis(dimethylamido) complexes. All complexes were characterized by NMR spectroscopy and elemental analysis. The solution structures of the complexes were more or less fluxional, depending on the substituent on the ligands. The complexes were tested as catalysts for the polymerization of ethylene and propene, in combination with different
合成了一系列的单阴离子,双齿的2-苯胺基甲基吡啶配体,并用于制备双(螯合物)Zr(IV)和Hf(IV)双(二甲基酰胺基)配合物。通过NMR光谱和元素分析对所有配合物进行表征。配合物的溶液结构或多或少是流动性的,这取决于配体上的取代基。测试了配合物与不同的活化剂一起作为乙烯和丙烯聚合的催化剂。使用Al i Bu 2 H –甲基铝氧烷作为助催化剂可产生出具有高活性的高分子量聚乙烯的催化剂,但仅产生立体不规则和区域规则性较差的聚丙烯。