1223575-58-3

Upstream product

• 16567-18-3 8-bromoquinoline 
• 24544-04-5 2,6-diisopropylbenzenamine 

Downstream Products

• 1330003-17-2 ((2,6-diisopropylphenyl)(quinolin-8-yl)amino)tribenzylhafnium 
• 1322092-17-0 [(N-2,6-diisopropylphenyl-quinolinyl-8-amino)Y(CH₂SiMe₃)(THF)] 
• 1322092-18-1 [(N-2,6-diisopropylphenyl-quinolinyl-8-amino)Lu(CH₂SiMe₃)2(THF)] 
• 1223575-51-6 (N-(2,6-diisopropylphenyl)quinolin-8-amine(-1H))Sc(CH₂SiMe₃)2(THF) 

Relevant academic research and scientific papers

Hafnium amidoquinoline complexes: Highly active olefin polymerization catalysts with ultrahigh molecular weight capacity

The preparation and characterization of a new class of polyolefin procatalysts is described. Hafnium tribenzyl procatalysts, supported by amidoquinoline ligands, were prepared in two steps from commercially available materials. Solid-state structures, determined by single-crystal X-ray analyses, revealed that all the hafnium complexes display approximate trigonal-bipyramidal geometry around the metal center. The complexes were evaluated in an ethylene/1-octene copolymerization study and were found to be highly active at elevated temperatures (120 °C). The best catalyst, derived from ((2,6-dimethylphenyl)(2,4-dimethylquinolin-8-yl)amino)tribenzylhafnium (6d), compares favorably to previously reported systems supported by bidentate nitrogen-based ligands. In particular, this catalyst exhibits very high molecular weight capacity and high catalytic activity, with a moderate 1-octene response. Alkyl substitution at the carbon ortho to the quinolino nitrogen was found to be an important factor for improving polymer compositional homogeneity, as evidenced by a narrowing of the polydispersity index and a single melting temperature in the resulting copolymer.

PROCESS FOR POLYMERIZING AN OLEFIN MONOMER AND CATALYST THEREFOR

The present invention generally relates to a process that polymerizes an olefin monomer, and a precatalyst and catalyst useful in such process.

Stereoselective polymerization of styrene with cationic scandium precursors bearing quinolyl aniline ligands

The novel N-R-quinolinyl-8-amino ligands HL1-5 (R = 2,6-Me 2C6H3 (HL1), 2,4,6-Me 3C6H2 (HL2), 2,6-Et 2C6H3 (HL3), 2,6-iPr 2C6H3 (HL4), C6H 5 (HL5)) reacted with Sc(CH2SiMe 3)3(THF)2 to afford the well-defined complexes (L1-5)Sc(CH2SiMe3)2(THF) (1-5), which were fully characterized by NMR spectral and X-ray diffraction analyses. Complexes 1-3 combined with organoborates to establish binary systems that exhibited high activity for the polymerization of styrene, while 4 was less active and 5 was almost inert. The cationic complex [L1Sc(CH 2SiMe3)(DME)2][B(C6F 5)4] (6) was successfully isolated by treatment of 1 with [PhMe2NH][B(C6F5)4], and represents probably the structural model of the initiation active species. Remarkably, upon addition of aluminum trialkyls to the binary systems, distinguished improvement in catalytic performances was achieved, among which the ternary system 1/5AliBu3/[Ph3C][B(C6F 5)4] displayed the highest activity (1.56 - 106 g mol-1 h-1) and syndioselectivity (r = 0.94) via a chain-end control mechanism governed by the concerted steric effect of the ligand and the aluminum alkyls. This represents the first non-cyclopentadienyl stabilized rare-earth metal based catalyst showing both high activity and specific selectivity for the polymerization of styrene, which might shed new light on designing more efficient precursors and further investigation of the mechanism for this polymerization.