Patent ID: 6020522
Filing Date: 2000-02-01
Classification: C07C,Y02P

Abstract:
A process for producing an aromatic hydroxycarboxylic acid derivative which comprises contacting an aromatic compound with oxygen in the presence of an imide compound as a catalyst, wherein said aromatic compound has a methyl group and a phenolic hydroxyl group protected by a protecting group and said imide compound is shown by the following formula (1) ##STR4## wherein R.sup.1 and R.sup.2 independently represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a cycloalkyl group, a hydroxyl group, an alkoxy group, a carboxyl group, an alkoxycarbonyl group, or an acyl group, or R.sup.1 and R.sup.2 may bond together to form a double bond or an aromatic and non-aromatic ring; X represents an oxygen atom or a hydroxyl group; and n denotes an integer of 1 to 3.