Process for preparing phenylterephthalic acid

Details Process for preparing phenylterephthalic acid Process for preparing phenylterephthalic acid

C - Chemistry, Metallurgy

07

C

C07C 63/331 (2006.01) C07C 51/265 (2006.01)

Patent

CA 2141789

Provided is a facile three step process for preparing 2-phenylterephthalic acid starting with p-xylene, followed by alkylation, dehydrogenation, and oxidation of the methyl groups corresponding to the original p-xylene. The product, 2-phenylterephthalic acid, is useful as an intermediate in the synthesis of polyesters comprised of residues of 2-phenylterephthalic acid.

L'invention se rapporte à un procédé simple, en trois étapes, permettant de préparer l'acide 2-phényltéréphtalique, et consistant à utiliser, au départ, du p-xylène, suivi de l'alkylation, la déshydrogénation et l'oxydation des groupes méthyle correspondant au p-xylène original. L'acide 2-phényltéréphtalique produit peut être utilisé comme un intermédiaire dans la synthèse de polyesters composés des restes d'acide 2-phényltéréphtalique.

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