16724-05-3Relevant academic research and scientific papers
METHOD FOR PRODUCING CARBOXYLIC ANHYDRIDE AND ARYLBORONIC ACID COMPOUND
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Page/Page column 13, (2012/01/13)
When phthalic acid is heated in heptane under azeotropic reflux conditions in the presence of a catalytic amount of an arylboronic acid compound (such as 2,6-(diisopropylaminomethyl)phenylboronic acid or 2,6-bis(diisopropylaminomethyl)phenylboronic acid), phthalic anhydride is obtained in high yield.
Bronsted base-assisted boronic acid catalysis for the dehydrative intramolecular condensation of dicarboxylic acids
Sakakura, Akira,Ohkubo, Takuro,Yamashita, Risa,Akakura, Matsujiro,Ishihara, Kazuaki
, p. 892 - 895 (2011/05/02)
Bronsted base-assisted boronic acid catalysis for the dehydrative self-condensation of carboxylic acids is described. Arylboronic acid bearing bulky (N,N-dialkylamino)methyl groups at the 2,6-positions can catalyze the intramolecular dehydrative condensation of di-and tetracarboxylic acids. This is the first successful method for the catalytic dehydrative self-condensation of carboxylic acids.(Figure Presented)
ISOMERISM IN COMPLEXES OF PYROMELLITIC ACID DIANILIDE WITH APROTIC POLAR SOLVENTS
Denisov, V. M.,Shibaev, L. A.,Dauengauer, S. A.,Sazanov, Yu. N.,Kol'tsov, A. I.
, p. 1141 - 1145 (2007/10/02)
A study has been carried out of isomerism in complexes of pyromellitic acid dianilide with aprotic polar solvents, and crystalline complexes have been isolated which contain only the paraisomer of the original acid.It has been shown to be possible to convert one isomeric complex into another in solution at moderate temperatures.
