This invention relates to a method for the preparation of benzo[b]naphthyridines having the general formula (I) ##STR1## comprising: 1) condensation of an amine having the formula R'--NH--CH.sub.2 --CH.sub.2 --R" with a chlorofluoroquinoline of formula (II) ##STR2## 2) cyclization of the obtained fluoroquinoline of formula (IV) ##STR3## and; 3) oxidation of tetrahydro-1,2,3,4benzo[b]naphthyridine-1,8 of formula (V) ##STR4## is effected, and then, optionally, the ester obtained is transformed into an acid and optionally into a salt.
本发明涉及一种制备具有通式(I)的苯并[b]
萘啉的方法,其中:1)将具有通式R'-NH-
CH2- -R"的胺与具有通式(II)的
氯氟喹啉缩合;2)环化所得的
氟喹啉具有通式(IV);3)氧化式(V)的四氢-1,2,3,4-苯并[b]
萘啉,然后,可选地,将所得的酯转化为酸,然后可选地转化为盐。