4198-95-2Relevant articles and documents
High norbornene incorporation in ethylene-norbornene copolymerization with a bis(α-alkyloxoimine) titanium-MAO catalyst
Gao, Haiyang,Hu, Hao,Wu, Qing
, p. 1634 - 1640 (2010)
A novel bis(α-alkyloxoimine) titanium(IV) complex was synthesized and used as a catalyst precursor to catalyze homo-and copolymerization of ethylene and norbornene. The titanium complex activated with methylalumoxane exhibits good activities for the homopolymerizations of ethylene and norbornene under high temperature to produce high-molecular-weight linear polyethylene and vinyl-type polynorbornene, respectively. Ethylene-norbornene copolymers with high molecular weight can also be produced by this catalyst. The incorporation of norbornene from 0 to 76 mol% in the copolymers can be controlled by varying the charged norbornene. 13C NMR analyses show that the microstructures of the ethylene-norbornene copolymers with low norbornene incorporation are predominantly alternated and isolated norbornene units, while those with high norbornene incorporation are random polymers containing long norbornene sequences. Science China Press and Springer-Verlag Berlin Heidelberg 2010.
Selective synthesis of 1,4,5-trisubstituted imidazoles from α-imino ketones prepared by N-heterocyclic-carbene-catalyzed aroylation
Takashima, Ryo,Tsunekawa, Kaoru,Shinozaki, Maki,Suzuki, Yumiko
, p. 2261 - 2267 (2018/04/02)
An alternative synthetic route to 1,4,5-trisubstituted imidazoles from α-imino ketone, which can be prepared from imidoyl chlorides and aromatic aldehydes via N-heterocycle carbene-catalyzed aroylation was developed. This methodology consists of simple tr
Synthesis and characterization of 9,10-bis(arylimino)-9,10-dihydrophenanthrenes, the structure of (Z,Z)-9,10-bis(phenylimino)-9,10-dihydrophenanthrene and PdCl2-[(E,E)-9,10-bis(phenylimino)-9,10-dihydrophenanthrene] in the solid state and in so
Van Belzen, Ruud,Klein, Rene A.,Smeets, Wilberth J.J.,Spek, Anthony L.,Benedix, Roland,Elsevier, Cornelis J.
, p. 275 - 285 (2007/10/03)
The synthesis and characterization of substituted phenanthrene-9,10-quinone diimines of the type 9,10-bis(arylimino)-9,10-dihydrophenanthrene (aryl-BIP) is described. These rigid bisnitrogen ligands have been synthesized by a metal-mediated cyclodehydroge