反应详情

Acetone (90 mL) was added to a mixture of 1.96 g (6 mmoles) of 6-fluoro-7-chloro-1-(1,1-dimethylethyl)-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid ethyl ester and 2.5 g (18 mmoles) of anhydrous potassium carbonate. To this suspension was added 1.33 mL (18 mmoles) of ethanethiol. After heating to reflux for 2.5 hours, the solvent was eliminated in vacuo. The residue was taken up with ethylacetate and water. The organic layer was separated, washed with water and brine, and dried over magnesium sulfate. The resulting solid was treated with ether to give 1.67 g of titled compound. MP 159°-60° C.

1. temperatureAfter heating
2. temperatureto reflux for 2.5 hours
3. customThe organic layer was separated
4. washwashed with water and brine
5. dry with materialdried over magnesium sulfate
6. additionThe resulting solid was treated with ether