Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Reexamination Certificate
2005-02-22
2005-02-22
Killos, Paul J. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
Reexamination Certificate
active
06858764
ABSTRACT:
A method for preparing bromofluorenes includes a step of dispersing a compound selected from the group consisting of fluorene, fluorenone, and derivatives of fluorene and fluorenone in water to prepare a disperse system. Bromination is initiated by adding bromine Br2into the disperse system. Thus, bromofluorenes can be efficiently and economically prepared without using any environmentally harmful organic solvent requiring a high cost to dispose of.
REFERENCES:
patent: 6344585 (2002-02-01), Mori
Adolf Sieglitz, “Studien in Der Fluoren-Reihe,” Berichte d. D. Chem. Gesellschaft, May 6, 1920, pp. 1232-1241.
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Charles J. Kelley, et al. “Synthesis of Bridged Oligophenylenes from Fluorene. Part 1. Ter -and Quarter-Phenyls,” J. Chem.Research (S) and J. Chem. Research (M), 1997, pp. 446-447 and pp. 2701-2733.
Maxime Ranger, et al. “New Well-Defined Poly(2,7-Fluorene) Derivatives: Photoluminescene and Base Doping” Macromolecules, 30, 1997, pp. 7686-7691.
F. K. Sutcliffe, et al. “The Synthese and Properties of Dyes and Pigments Containing A 9,9-Spirobifluorene Residue” JSDC, Jul. 1978, pp. 306-309.
Ruilian Wu, et al. “Convergent Synthetic Routes to Orthogonally Fused Conjugated Oligomers Directed Toward Molecular Scale Electronic Device Applications” J. Org. Chem, 1996, pp. 6906-6921.
Hachiya Tetsuo
Kitamura Naoyuki
Mori Hiroaki
Yasuda Toshiyuki
JFE Chemical Corporation
Killos Paul J.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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