Synthesis, characterization and polymerization properties of isopropylidene(η5-3-neomenthylcyclopentadienyl)(η5-fluorenyl)zirconium dichloride

Halterman, Ronald L.; Fahey, Darryl R.; Mar'in, V. P.; Dockter, David W.; Khan, Masood A.

doi:10.1016/s0022-328x(00)00786-5

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…After double deprotonation with n -BuLi and reaction with ZrCl 4 , C1-symmetric ansa zirconocene dichloride complexes were obtained that display excellent properties in propylene polymerization . Several research groups have contributed to this area over the last 25 years. − Depending on the steric bulk on the fluorene and fulvene moiety, different selectivities in the polymerization of propylene could be obtained. Several racemic chiral-at- ansa -bridged group 4 metal complexes were recently prepared by Carpentier and co-workers and used in highly iso selective propylene polymerization (Scheme ).…”

Section: Pentafulvenes In Metallocene Chemistrymentioning

confidence: 99%

Recent Advances in the Chemistry of Pentafulvenes

et al. 2017

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Pentafulvenes are a unique class of compounds that originally attracted attention due to their propensity to display nonbenzenoid aromaticity. Subsequently, they were recognized as valuable synthons for the construction of a wide range of compounds by virtue of their ability to display multiple cycloaddition profiles. Naturally, this area of organic chemistry has experienced rapid growth over the last five decades, fueled by elegant work showcasing the unique reactivity of pentafulvenes in a plethora of cycloaddition reactions. In this Review, we have attempted to provide a systematic account of the methods for the generation of pentafulvenes, their rich and varied cycloaddition chemistry, organometallic reactions, and theoretical studies that support their versatility. Further, we have highlighted their applications in the synthesis of a variety of complex structural frameworks. It is our conviction that this Review will be useful to a wide range of chemists, and will spur further research in this promising area.

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Section: Pentafulvenes In Metallocene Chemistrymentioning

confidence: 99%

Recent Advances in the Chemistry of Pentafulvenes

et al. 2017

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“…In a separate category, reminiscent of the approach used by Erker and others to diastereoselectively complex indenyl ligands, a neomenthyl-modified cyclopentadiene unit linked to a fluorene was prepared and used to synthesize the corresponding planar chiral ansa-zirconocene (equation 4). 69 Unfortunately the diastereoselectivity was only modest (60:40), and the major isomer could neither be isolated nor identi- fied unambiguously, as the mixture crystallized with the same diastereomer ratio.…”

Section: η 5 -Complexesmentioning

confidence: 99%

Enantiomerically Pure Planar Chiral Organometallic Complexes via Facially Selective π-Complexation

Paley

2002

Chem. Rev.

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Strategies for the Synthesis of Chiral Carbon‐Bridged Group IV ansa‐Metallocenes

Bau

Wiesler

Younas

et al. 2019

Chemistry A European J

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This minireview provides a survey of the various synthetic approaches to chiral ansa‐metallocenes of Ti, Zr, and Hf containing a carbon‐based bridge. The individual strategies to install substitution patterns at either the cyclopentadienyl framework or the bridging unit are highlighted with focus on the progress made towards a direct preparation of single complex stereoisomers. The review further includes the discussion of potential problems such as the formation of undesired diastereomers, the threat of racemization of enantiopure material, and synthetic challenges originating from the synthesis, purification, and isolation of the target complexes. The review has been written with the goal in mind to facilitate the design and synthesis of new chiral ansa‐metallocene derivatives for emerging research areas in asymmetric catalysis and organometallic chemistry.

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Synthesis, characterization and polymerization properties of isopropylidene(η5-3-neomenthylcyclopentadienyl)(η5-fluorenyl)zirconium dichloride

Cited by 7 publications

References 15 publications

Recent Advances in the Chemistry of Pentafulvenes

Recent Advances in the Chemistry of Pentafulvenes

Enantiomerically Pure Planar Chiral Organometallic Complexes via Facially Selective π-Complexation

Strategies for the Synthesis of Chiral Carbon‐Bridged Group IV ansa‐Metallocenes

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