有機酸の合成とその応用に関する研究(第3報)

m-キシレンよりベンゼンポリカルボン酸類の合成

抄録

The synthesis of benzene-polycarboxylic acids of growing demand for theproduction of synthetic fiber and plastics has been investigated using m-xylene as a starting compound. The present study has been directed to establish the synthesis conditions and yields for mesitylene (2) and isodurene (3) through the Friedel-Crafts reaction of m-xylene (1); 4-chloromethyl-m-xylene (4) and 4, 6-dichloromethylm-xylene (5) through chloromethylation of (1); and 2-chloromethylmesitylene (6) and 2, 4-dichloromethylmesitylene (7) through chloromethylation of (2). Trimesic acid, trimellitic acid, pyromellitic acid, prehnitic acid, and benzenepentacarboxylic acid were obtained via potassium permanganate oxidation of (2), (4), (5), (6), and (7), respectively, and the effects of the reaction time on the yields have also been studied.