Pyridochinolinderivate und Verfahren zu deren Herstellung

Procedure for obtaining pyridoquinoline derivatives, of general formula **(See formula)** wherein ring a means a group of the formula **(See formula)** where to formulas II to V means a single bond between the pyridine ring and the benzene ring A in formula I; R1 signifies a hydrogen atom or a methyl radical; R2 signifies a hydroxy, C1-6 alkoxy, phenyl C7-10 alkoxy or phenoxy radical; and optionally benzene ring B may contain no more than 2 substituents chosen from radicals 0-alkyl, cycloalkyl having no more than 6 carbon atoms, C1-6-alkoxy, trifluoromethyl, phenyl and phenoxy, and halogen atoms, and the radicals -NR3 R4 where R3 signifies a C1-6 alkyl radical, and R4 signifies a C1-6 alkyl or phenyl radical, or where -NR3 R4 signifies a nitrogen-containing heterocyclic radical of not more than 7 ring atoms ; or in the case of formulas II or IV, the benzene ring B may optionally contain an alkylene radical of 3-5 carbon atoms; and where when R1 signifies a methyl radical the compounds are only 1,7-phenanthroline derivatives, each of which is substituted in position 5 or 6 by -C1-5 alkyl, 1-4 -alkoxy, phenoxy, piperidine or morpholino or 5,6-dimethyl or 5-fonyl-6-methoxy substituents or a 5,6-alkylene substituent of 3-5 carbon atoms; characterized by comprising the Conrad-Limpach reaction of a diamino compound of the formula **(See formula)** where B has the meaning indicated above and a compound of the formula R2C0. CHR1.C0. COR2 XIII where R1 has the meaning indicated above and R2 means a C1-6 alkoxy radical. (Machine-translation by Google Translate, not legally binding)