Novel yttrium and zirconium catalysts featuring reduced Ar-BIANH<sub>2</sub> ligands for olefin hydroamination (Ar-BIANH<sub>2</sub> = bis-arylaminoacenaphthylene)
作者:Alessandro Cimino、Filippo Moscatelli、Francesco Ferretti、Fabio Ragaini、Stéphane Germain、Jérôme Hannedouche、Emmanuelle Schulz、Lapo Luconi、Andrea Rossin、Giuliano Giambastiani
DOI:10.1039/c6nj02199a
日期:——
be used as catalysts for cyclohydroamination of a number of primary and secondary aminoalkenes. The complex [(2,6-iPr2C6H3-BIAN)Zr(NMe2)2(η1-NHMe2)] was isolated and completely characterized, including X-ray diffraction analysis. Despite its easy and almost quantitative isolation, it showed only moderate catalytic performance in the intramolecular hydroamination, irrespective of the cyclization precursor
新型的双芳基氨基ac烯(Ar-BIANH 2)用于制备锆和钇配合物,用作许多伯氨基和仲氨基烯烃的环加氢胺化催化剂。络合物[(2,6-的iPr 2 C ^ 6 ħ 3 -BIAN基)Zr(NME 2)2(η 1 -NHMe 2)]分离和完全表征,包括X射线衍射分析。尽管其容易且几乎定量分离,但无论使用何种环化前体,其在分子内加氢胺化反应中仅表现出中等催化性能。另一方面,原位生成Y III发现使用相同种类的配体获得的配合物具有很高的活性,从而导致底物的氢化氨基化,包括通常不愿进行环化的底物,例如具有内部未活化C C双键的底物。给电子的取代基,尤其是配体上的位阻改善了催化剂的性能,使我们在后一种情况下可以将催化剂的载量降低到1mol%。