申请人:Aziende Colori Nazionali Affini ACNA S.p.A.
公开号:US04011227A1
公开(公告)日:1977-03-08
7-OXO-7H-dibenzo-[d e,h]-quinolin-2-ol which is useful as an intermediate in the preparation of dyestuffs is prepared by cycloisomerizing the novel compound, N-phenylacetyl phthalimide in an inert solvent and in the presence of a Friedel-Crafts catalyst to form the novel compound O-(3-hydroxy-1-isoquinolinyl)-benzoic acid which is then cyclized by dehydrating condensation to form the 7-oxo-7H-dibenzo-[d e,h]-quinolin-2-ol.
本发明涉及一种用作染料制备中间体的7-OXO-7H-dibenzo-[d e,h]-quinolin-2-ol,其通过在惰性溶剂中,在Friedel-Crafts催化剂存在下环化新化合物N-苯乙酰基邻苯二甲酰亚胺,形成新化合物O-(3-羟基-1-异喹啉基)-苯甲酸,然后通过脱水缩合环化形成7-氧代-7H-二苯并[d e,h]-喹啉-2-醇。