3-Aminomethylene-6,7-dimethoxy-2-methyl-4-oxo-1,2,3,4-tetrahydro-1-quinoline carboxylic acid esters and intermediates leading thereto

Claim 1

A racemic compound selected from the group consisting of ##SPC13## wherein R 1 taken separately is selected from the group consisting of hydrogen and methyl; R 2 taken separately is selected from the group consisting of hydrogen, alkyl having from one to five carbon atoms, propargyl, phenyl, naphthyl, phenylalkylene wherein said alkylene has from one to four carbon atoms, naphthylalkylene wherein said alkylene has from one to four carbon atoms, dimethylaminoalkylene wherein said alkylene has from two to four carbon atoms and mono-substituted 2-ethyl wherein said substituent is selected from the group consisting of methoxy and phenoxy; R 3 is selected from the group consisting of alkyl having from one to five carbon atoms, phenyl, benzyl and mono-substituted benzyl and phenyl wherein said substituent is selected from the group consisting of fluoro, chloro, methyl, methoxy and trifluoromethyl; and the pharmaceutically acceptable acid addition salts thereof wherein R 2 is said dimethylaminoalkylene.