4984-82-1Relevant articles and documents
Metallocene compounds, metallocene catalysts including the compounds and methods of polymerizing olefins with the catalysts
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, (2008/06/13)
There are disclosed new metallocene compounds and catalysts for olefin polymerization. The metallocene compound is a complex of transition metal and cyclopentadienyl-type ligands substituted with silacycloalkyl group. The metallocene catalyst comprises the above metallocene compound and at least one activator such as aluminoxanes, aromatic boron compounds substituted with fluoride, and modified clays. The metallocene catalyst can be used for polymerization of olefin in liquid phase, slurry phase or gas phase process.
Process for the preparation of cyclopentadienyl metal salt and process for the preparation of derivative of cyclopentadiene using the same
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, (2008/06/13)
A cyclopentadienyl metal salt is prepared by reacting a cyclopentadiene and a metal hydride in the presence of an amine compound. Furthermore, a derivative of a cyclopentadiene in which a phenyl group is bonded to its cyclopentadienyl moiety through an element of the 14 group of the Periodic Table is prepared using such a reaction.
Asymmetric synthesis of optically active prostaglandins
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, (2008/06/13)
An asymmetric synthesis of optically active prostaglandin F2α from cyclopentadiene including intermediates in this synthesis.