Reaktion #216737

Reaktionsgleichung

product

6-chloro-1-cyclopropyl-7,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid

2,6-dimethylmorpholine

diazabicyclo[2.2.2]octane

→

6-chloro-1-cyclopropyl-8-fluoro-1,4-dihydro-7-(2,6-dimethyl-4-morpholinyl)-4-oxo-3-quinolinecarboxylic acid

Ausbeute 41.0%

Lösungsmittel

dimethyl sulphoxide

Reaktionsbedingungen

Aufarbeitung

1. 1
   EinengenThe mixture is concentrated under high vacuum
2. 2
   Filtrationthe precipitate is filtered off with suction
3. 3
   Sonstigerecrystallized from glycol monomethyl ether

Vorschrift

3 g (10 mmol) of the product from Example A in 35 ml of dimethyl sulphoxide are heated at 140° with 1.2 g (10 mmol) of 2,6-dimethylmorpholine and 2.2 g (20 mmol) of diazabicyclo[2.2.2]octane for 5 hours. The mixture is concentrated under high vacuum, stirred with 30 ml of water, the pH is adjusted to 6 with 2N hydrochloric acid, and the precipitate is filtered off with suction and recrystallized from glycol monomethyl ether. 1.6 g (41% of theory) of 6-chloro-1-cyclopropyl-8-fluoro-1,4-dihydro-7-(2,6-dimethyl-4-morpholinyl)-4-oxo-3-quinolinecarboxylic acid of melting point 258°-261° (with decomposition) is obtained.

Quelle