Zirconocene dichloride complexes with a 1,2-naphthylidene bridge as catalysts for the polymerisation of ethylene and propylene
摘要:
Ansa-zirconocene dichloride complexes containing a 9-fluorenyl group at the 1-position of naphthalene and a 2-indenyl 12, 1-indenyl 13, or cyclopentadienyl 14 group at the 2-position of the naphthalene were synthesised and characterised. The molecular structures of the complexes have been determined by single crystal X-ray diffraction studies. After activation with excess methyl-alumoxane (MAO). the complexes were used as homogeneous catalysts for the homopolymerisation of ethylene and propylene. (C) 2004 Elsevier B.V. All rights reserved.
Di-lithiation of +ac(R)-1-methyl-9-[2-(2-indenyl)-1-naphthyl]fluorene, +ac(R)-6, generates an axially chiral fluorenyl ligand, (a-S)-10, which on reaction with ZrCl4enantiospecifically提供平面手性柄型-zirconocene(对小号) - [1-(1-甲基- 9-芴基)-2-(2-茚基)萘]二氯化锆,(对小号) - 8 ; 已被确定为外消旋单晶X射线结构安莎-zirconocene外消旋- 8和相关Ç小号-对称安莎-锆茂 7。
A new synthesis of 3-substituted-1H-indenes through reaction of o-(β-magnesioalkyl)phenylmagnesium dihalides with carboxylate esters
作者:Robert W. Baker、Michael A. Foulkes、Michael Griggs、Bao N. Nguyen
DOI:10.1016/s0040-4039(02)02344-4
日期:2002.12
A new synthesis of 3-substituted-1H-indenes has been developed through the reaction of o-(β-magnesioalkyl)phenylmagnesium dihalides with carboxylate esters, followed by dehydration of the intermediate 1-substituted-1-indanols. Di-Grignard reagents allowing the synthesis of 3-substituted-, 2-methyl-3-substituted-, and 4-methyl-3-substituted-1H-indenes have been prepared, with overall yields for the