Synthesis and characterization of unbridged metallocene dichloride complexes with two differently mono-substituted indenyl ligands and their application as catalysts for the polymerization of ethene and propene
摘要:
The synthesis of unbridged metallocene dichloride complexes of the type Ind(#)Ind ' ZrCl2 (Ind(#) = 2-arylalkyl-substituted indenyl, Ind ' = 1-omega -alkenyl-substituted or 2-alkyl-substituted indenyl) is described. The complexes are characterized by H-1 and C-13 NMR spectroscopy and mass spectrometry and tested for the catalytic polymerization of ethene and propene. The polymerization results and the polymer properties indicate a considerable influence of the catalyst structure on the polymerization behavior. (C) 2001 Elsevier Science B.V. All rights reserved.
Selective Catalytic C–H Alkylation of Alkenes with Alcohols
作者:Dong-Hwan Lee、Ki-Hyeok Kwon、Chae S. Yi
DOI:10.1126/science.1208839
日期:2011.9.16
A ruthenium catalyst forms carbon-carbon bonds between olefins and alcohols while liberating only water as a by-product. Alkenes and alcohols are among the most abundant and commonly used organic feedstock in industrial processes. We report a selective catalytic alkylation reaction of alkenes with alcohols that forms a carbon-carbon bond between vinyl carbon-hydrogen (C–H) and carbon-hydroxy centers
Catalytic Tandem and One-Pot Dehydrogenation–Alkylation and −Insertion Reactions of Saturated Hydrocarbons with Alcohols and Alkenes
作者:Junghwa Kim、Nuwan Pannilawithana、Chae S. Yi
DOI:10.1021/acscatal.6b02186
日期:2016.12.2
reaction of saturated hydrocarbon substrates with alcohols to form the alkyl-substituted alkene and arene products. The analogous one-pot dehydrogenation–insertion of saturated ketones with alkenes and dienes directly yielded synthetically useful 2-alkylphenol and benzopyran products in a highly regio- and stereoselective manner without forming any wasteful byproducts.