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.
Gold(I) Carbenes by Retro-Buchner Reaction: Generation and Fate
作者:Yahui Wang、Paul R. McGonigal、Bart Herlé、Maria Besora、Antonio M. Echavarren
DOI:10.1021/ja411626v
日期:2014.1.15
The fate of the aryl gold(I) carbenes generated by retro-Buchner reaction of ortho-substituted 7-aryl-1,3,5-cycloheptatrienes is dependent on the constitution of the ortho substituent. Indenes and fluorenes are obtained by intramolecular reaction of highly electrophilic gold(I) carbenes with alkenes and arenes. According to density functional theory calculations, the gold-catalyzed retro-Buchner process
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
作者:Roland Schmidt、Matthias Deppner、Helmut G Alt
DOI:10.1016/s1381-1169(01)00122-4
日期:2001.7
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.