Process for the preparation of 7-oxo-7H-dibenzo-[d e,h]-quinolin

Details Process for the preparation of 7-oxo-7H-dibenzo-[d e,h]-quinolin Process for the preparation of 7-oxo-7H-dibenzo-[d e,h]-quinolin

1974-12-26

1977-03-08

Coughlan, Jr., Paul M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 514

Patent

active

040112241

ABSTRACT:
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.

REFERENCES:
patent: 3912739 (1975-10-01), Boffa et al.

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