Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2005-09-27
2005-09-27
Tsang, Cecilia J. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S488000, C562S840000
Reexamination Certificate
active
06949674
ABSTRACT:
A novel aromatic carboxylic acid useful as a material for macromolecular compounds and, in particular, for polycondensed macromolecular compounds exhibiting excellent heat resistance, an acid halide derivative thereof and a process for producing these compounds are disclosed. The aromatic carboxylic acid and the acid halide derivative thereof have structures represented general formulae (1) and (2), respectively, and can be efficiently produced from a dialkyl ester derivative of isophthalic acid and an acetylene derivative in accordance with the disclosed process comprising specific steps.In the above formulae, A represents:in-line-formulae description="In-line Formulae" end="lead"?—C≡C—R1 (a)in-line-formulae description="In-line Formulae" end="tail"?or(R1represents hydrogen atom, an alkyl group or an aromatic group, R2represents an alkyl group or an aromatic group) and X represents a halogen atom.
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Crisp, Geoffrey T. et al., “Palladium-Catalysed Coupling of Terminal Alkynes with Aryl Halides Aided by Catalytic Zinc,” Journal of Organometallic Chemistry, 1998, pp. 219-224, vol. 570, No. 2, Elsevier Science S.A. (6 pages).
Enoki Takashi
Hase Yoko
Higashida Nobuhiro
Ishida Yuichi
Okanuma Masako
Oh Taylor Victor
Smith , Gambrell & Russell, LLP
Sumitomo Bakelite Company Ltd.
Tsang Cecilia J.
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