Phosgene → HCID 20477505, compound

Participants

Reaction Conditions

Reaction Steps

33.0 parts of 6-fluoro-4-oxo-1,2,3,4-tetrahydroquinoline and 200 parts of dioxane were mixed, and 39.6 parts of phosgene were introduced to the stirred mixture over about 30 minutes while the temperature was maintained at 20°-25° C. After the introduction, the temperature was raised gradually, and the reaction was effected at 40°-45° C. for 2.5 hours, after which the temperature was further raised to 70° C., nitrogen gas was passed through the mixture, and the solvent (dioxane) was distilled off under reduced pressure. Petroleum ether was added to the residue followed by filtration, washing and drying, and there was obtained 43.7 parts of 6-fluoro-4-oxo-1-chloroformyl-1,2,3,4-tetrahydroquinoline.

Provenance & Evidence