申请人:Rhone-Poulenc Sante
公开号:US04412076A1
公开(公告)日:1983-10-25
Process for the preparation of 4-hydroxyquinolines of the general formula: ##STR1## in which R represents a hydrogen atom, or one, two or three substituents, which may be the same or different, selected from halogen atoms, alkyl radicals containing 1 to 4 carbon atoms, alkoxy radicals containing 1 to 4 carbon atoms, and the trifluoromethyl radical, the substituent(s) being in the 2-, 3-, 5-, 6-, 7- or 8-position, by the oxidation, by means of oxygen or air, in the presence of a catalyst based on platinum or ruthenium, or alloys thereof, of a 1,2,3,4-tetrahydroquinolin-4-one of the general formula: ##STR2## in which R is as defined above.
制备一般式为:##STR1##的4-羟基喹啉的过程,其中R代表氢原子,或一个、两个或三个取代基,可以相同或不同,选择自卤素原子、含有1至4个碳原子的烷基基团、含有1至4个碳原子的烷氧基团和三氟甲基基团,取代基位于2-、3-、5-、6-、7-或8-位置,通过在氧气或空气存在的情况下,以基于铂或钌的催化剂或其合金氧化1,2,3,4-四氢喹啉-4-酮的过程。其中R如上所定义。