BIS-PHENYL-PHENOXY POLYOLEFIN CATALYSTS HAVING A METHYLENETRIALKYLSILICON LIGAND ON THE METAL FOR IMPROVED SOLUBILITY
申请人:Dow Global Technologies LLC
公开号:US20200270282A1
公开(公告)日:2020-08-27
Embodiments are directed to a catalyst system comprising metal-ligand complexes and processes for polyolefin polymerization using the metal-ligand complex having the following structure, Formula (I), where X is selected from the group consisting of —(CH2)SiRX3.
Regioselective synthesis of tetra(aryl)-mono(silylmethyl)[60]fullerenes and derivatization to methanofullerene compound
作者:Chang-Zhi Li、Yutaka Matsuo、Eiichi Nakamura
DOI:10.1016/j.tet.2011.09.125
日期:2011.12
A method for the facile synthesis of tetraaryl-trimethylsilylmethyl-hydro[60]fullerenes, C60Ar4(CH2SiMeR)H, has been developed in which readily prepared anionic mono(silylmethyl) fullerene is subjected to reaction conditions for organocopper-mediated multiple addition. Penta(organo)fullerene derivatives bearing different substituents and diverse functionality were synthesized in moderate to good yield
Regioselective Synthesis of 1,4-Di(organo)[60]fullerenes through DMF-assisted Monoaddition of Silylmethyl Grignard Reagents and Subsequent Alkylation Reaction
Monoaddition of Grignard reagents, in particular tri(organo)silylmethyl magnesium chlorides, to [60]fullerene took place smoothly in the presence of dimethylformamideto produce (organo)(hydro)[60]fullerenes, (C60RH)-H-1, in good yield (up to 93% isolated yield). The hydrofullerene was then deprotonated to generate the corresponding anion, C60R-, which was then alkylated to obtain 58 pi-electron di(organo)[60]fullerenes, (C60RR2)-R-1, in good to high yield (up to 93% overall yield). The two-step methodology provides a wide variety of 1,4-di(organo)[60] fullerenes bearing the same or different organic addends on the [60] fullerene core. By changing the addends, one can control the chemical and physical properties of the compounds at the molecular and bulk levels.