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Acetic Acid → 5,6,7,8-Tetrafluoro-1-(2,4-difluorophenyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid
関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|---|---|---|
| 反応物 | Acetic Acid | HCID 176 | — |
| 反応物 | Sulfuric Acid | HCID 1118 | — |
| 反応物 | Ethyl 5,6,7,8-tetrafluoro-1-(2,4-difluorophenyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylate | HCID 15070037 | — |
| 溶媒 | Water | HCID 962 | — |
| 生成物 | 5,6,7,8-Tetrafluoro-1-(2,4-difluorophenyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid | HCID 15070038 | 92.5% |
反応手順
40.1 g of ethyl 5,6,7,8-tetrafluoro-1-(2,4-difluorophenyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylate are added to a mixture of 28.5 ml of concentrated sulphuric acid, 250 ml of glacial acetic acid and 200 ml of water and the mixture is heated under reflux for 2 hours. The hot solution is poured onto ice and the precipitate is filtered off with suction, washed with water and dried. 34.5 g of the title compound of melting point 250°-252° C. are obtained.
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 特許番号 | US05059597 |
| 出典データセット | uspto-grants-1991_10 |
| ORD ID | ord-690bd7e5712749fb8e6a3dee29fd11b1 |
| 出典メモ | uspto-grants-1991_10 |