| 摘要 |
PURPOSE:To obtain simply the titled substance useful as agricultural chemicals, photographic chemicals, ultraviolet light absorbers, etc. in high yield, by reacting an aromatic compound except phenols with carboxylic acids in the presence of an ion exchange-type layered clay catalyst. CONSTITUTION:A compound expressed by the formula (R is H, alkyl, alkoxyl or halogen atom; m is 1, 2 or 3; X and Y are H together or hydrocarbon group necessary to form naphthalene ring or tetralin ring by linking to each other, or one of X and Y is phenyl and the other is H) is reacted with carboxylic acids in the presence of an ion-exchange-type layered clay catalyst at 150-250 deg.C to obtain the titled substance. As for the above-mentioned catalyst, synthetic mica, montmorillonite, vermiculite, hectorite, etc., are mentioned; however, the synthetic mica in which 20-100% of ion exchangeable interlayer ion is exchanged by a metal ion except alkali ion or proton is preferred. EFFECT:The catalyst has no corrosiveness and does not require waste-water treatment, etc. |
