Trianionic ligand precursor compounds and uses thereof in constrained geometry catalysts
申请人:Mason Mark R.
公开号:US08524846B1
公开(公告)日:2013-09-03
Trianionic ligand precursor compounds, catalyst systems containing the precursor compounds, and uses of the precursor compounds are described. The present invention also provides constrained geometry catalysts, methods to make the constrained geometry catalysts and methods to use the constrained geometry catalysts in various reaction systems, including polymerization, metathesis reactions, and hydroamination reactions.
Highly flexible synthesis of indenylethylamines as ligand precursors for titanium complexes
作者:Jan H. Ross、Stefan H. Rohjans、Marc Schmidtmann、Sven Doye
DOI:10.3998/ark.5550190.p008.859
日期:——
Various indenylethylamines are synthesized for the first time by reductive amination of 2-(1Hinden-1-yl)acetaldehyde with commercially available primary amines. In addition, a new twostep synthesis of 2-(1H-inden-1-yl)acetaldehyde that uses inexpensive indene and 2-bromo-1,1diethoxyethane as starting materials is presented. Finally, a selected indenylethylamine is used as a ligandprecursor for the
New class of trianionic constrained geometry ligands: Representative complexes of zirconium
作者:Ryan T. Rondo、Kristin Kirschbaum、Mark R. Mason
DOI:10.1016/j.jorganchem.2021.121830
日期:2021.7
3-methylindole yields fluorenylbis(3-methylindolyl)ethane (3) or indenylbis(3-methylindolyl)ethane (4), respectively. Compounds 3 and 4 were used to demonstrate the coordination modes of this newclass of ligands to zirconium. Transamination of Zr(NEt2)4 with 3 (H3L) yields (HL)Zr(NEt2)2(THF) (5) in which doubly deprotonated 3 chelates zirconium via two N-indolide moieties. The fluorenyl group remains