Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Reexamination Certificate
2007-01-23
2007-01-23
Nazario-Gonzalez, Porfirio (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
C568S379000, C568S667000, C568S669000, C585S023000
Reexamination Certificate
active
10962482
ABSTRACT:
There are provided a method of simply preparing a 1,4,6-substituted, 1,4-substituted, 1,6-substituted, or 1-substituted fulvene compound, the intermediates of the fulvene compound, and a method of preparing an ansa-metallocene compound in which two cyclopentadienyl ligands are bridged by one carbon and there are substituents only at positions adjacent to the bridging point of a cyclopentadienyl ligand, using the fulvene compound.
REFERENCES:
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patent: WO 2005035470 (2005-04-01), None
Won et al., Synthesis, No. 7, pp. 1052-1056 (published on the Web Feb. 4, 2004).
“ansa-Metallocene derivatives”, XVII. Racemic and meso diastereomers of group IV metallocene derivatives with symmetrically substituted, . . . , Journal of Organometallic Chemistry, 369 (1989) 359-370, Elsevier Sequoia S.A., Lausanne—Printed in The Netherlands; by Helga Wiesenfeldt, Annette Reinmuth, Elke Barsties, Kaspar Evertz and Hans-Herbert Brintzinger.
“ansa-Metallocene derivatives”, XVI. Chiral titanocene and zirconocene derivatives with symmetrically substituted, . . . ,Journal of Organometallic Chemistry, 369 (1989) 343-357, Elsevier Sequoia S.A., Lausanne—Printed in The Netherlands; by Stephan Gutmann, Peter Burger, Hans-Ulrich Hund, Josef Hofmann and Hans-Herbert Brintzinger.
Synthesis of [2,2′-Methylenebis (1,3-dimethylcyclopentadienyl) zirconium Dichloride and Its Reactivity in Ethylene-Norbornene Copolymerization by Bun Yeoul Lee, Young Heui Kim, Young Chul Won, Jin Wook Han, Won Hyuk Suh, In Su Lee, Young Keun Chung and Kwang Ho Song, Department of Molecular Science and Technology, Ajou University, Korea, received Oct. 15, 2001.
Synthesis, molecular structure, and polymerization reactivity of ethylenebis (1,3-dimethylcyclopentadienyl) zirconium dichloride by Bun Yeoul Lee, Young Heui Kim, Young Chul Won, Chang Bo Shim, Dong Mok Shin and Young Keun Chung, Department of Molecular Science and technology, Ajou Univeristy, Korea, received Apr. 22, 2002.
General Synthetic Routes to Chiral, Ethylene-Bridged ansa-Titanocene Dichlorides by S. Collins and Nicholas J. Taylor, Guelph Waterloo Centre for Graduate Work in Chemistry, University of Waterloo, Ontario, Canada, received Feb. 22, 1990.
Fulvene having substituents only on 1-,4-, and 6-positions: a key intermediate for novel ansa-metallocene complexes by Young Chul Won, Heon Yong Kwon, Bun Yeoul Lee and Young-Whan Park, Department of Molecular Science and Technology, Ajou University, received Apr. 3, 2003.
Direct α-Iodination of Cycloalkenones by Carl R. Johnson, Joseph P. Adams, Mastthew P. Braun and C.B.W. Senanayake, Department of Chemistry, Wayne State University; and Peter M. Wovkulich and Milan R. usokovic, Roche Research Center, hoffmann-La Roche, Inc., pp. 917-918, received Nov. 13, 1991.
Hong Sung Don
Jeong Boong Goon
Jung Hye Young
Lee Bun Yeoul
Lee Hyosun
Birch & Stewart Kolasch & Birch, LLP
LG Chem. Ltd.
Nazario-Gonzalez Porfirio
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