Aryl ethynyl phthalic acid derivative and method for...

Details Aryl ethynyl phthalic acid derivative and method for... Aryl ethynyl phthalic acid derivative and method for...

2008-03-04

2008-03-04

Solola, Taofiq (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

Reexamination Certificate

active

07339071

ABSTRACT:
The invention provides an aryl ethynyl phthalic acid and derivatives thereof (including fluorine-containing compounds) represented by Formulae 1, 3, 5, 4A and 5A including the structure of Formula 2, and method of producing these compounds, in which an aryl ethynyl phthalic anhydride is formed by subjecting an aryl phthalic acid to ring closing:

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T. Takekoshi, “High Temperature Thermoset Polyimides Containing Disubstituted Acetylene End Groups”, Polymer, vol. 35, No. 22, 1994, pp. 4874-4880.
P. M. Hergenrother, et al., “Chemistry and Properties of Imide Oligomers End-Capped With Phenylethynyphthalic Anhydrides”, Polymer, vol. 35, No. 22, 1994, pp. 4857-4864.
J. G. Smith, Jr., et al., “Chemistry and Properties of Phenylethynyl Phthalic Anhydride Imide Oligomers”, Polymer Preprints, vol. 35, 1995, pp. 353-354.
Database. Caplus Online! Chemical Abstracts Service, Columbus, Ohio, US; Blatchly, Richard A. et al: “Theoretical Study of Helix Formation in Substituted Phenylene Ethynylene Oligomers”, STN Data base Accession No. 2003:832966, RN:637357-70-1 for Journal of Organic Chemistry, 68(23), 8780-8785(2003).
J. A. Johnston, F. M. Li, F. W. Harris and T. Takekoshi, Synthesis and characterization of imide oligomers end-capped with 4-(phenylethynyl)phthalic anhydrides; Polymer, vol. 35, No. 22, 1994, pp. 4865-4873.

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