FIELD: chemistry of heterocyclic compounds. SUBSTANCE: condensed heterocyclic system of 2,3-dihydropyrido[1,2,3-de] -1,4-benzoxazinium has formula $$$ where R, $$$ and $$$ is H; or R is Br and $$$ and $$$ is H; or R is H, $$$ is $$$ and $$$ is H; or R is Cl, $$$ is H and $$$ is Cl. Novel condensed heterocyclic system of 2,3-dihydropyrido[1,2,3-de]-1,4-benzoxazinium and its 8-bromo-, 9-nitro and 8,10-dichloro-substituted compounds are prepared as corresponding chlorides, the process takes place by intramolecular quaternization of 8-(2-chloroethoxy)quinoline and suitable 5-,6- and 5,7-substituted chloroethoxyquinolines. EFFECT: improved quality.
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| SPIROCOMPOUND OR SALTS THEREOF, METHOD OF PREPARATION THEREOF, AND PHARMACEUTICAL COMPOSITION BASED THEREON HAVING ANTIMICROBIAL ACTIVITY | 1989 |
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| AZABICYCLO-QUINOLONE CAROBOXYLIC ACIDS OR THEIR PHARMACEUTICALLY ACCEPTABLE ACID-ADDITIVE SALTS AND INTERMEDIATE PRODUCTS FOR THEIR SYNTHESIS | 1989 |
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