HuagongsheHuagongshe Chemistry Print Report · For research reference only
Hydrochloric Acid → 1-(2,4-Difluorophenyl)-5-methyl-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Hydrochloric Acid | HCID 313 | — |
| Reactant | Ethyl 6,7,8-trifluoro-1-(2,4-difluorophenyl)-1,4-dihydro-5-methyl-4-oxo-3-quinolinecarboxylate | HCID 14651271 | — |
| Solvent | Acetic Acid | HCID 176 | — |
| Product | 1-(2,4-Difluorophenyl)-5-methyl-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid | HCID 14651270 | 73.3% |
Reaction Steps
Employing ethyl 1-(2,4-difluorophenyl)-5-methyl-6,7,8-trifluoro-1,4-dihydro-4 -oxoquinoline-3-carboxylate (4.3 g) and conc. hydrochloric acid: 90% acetic acid (1:4) (80 ml), the procedure of Reference Example 23 is repeated to give 1-(2,4-difluorophenyl)-5-methyl-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid (2.93 g), as white powder, m.p. 221°-222° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05495020 |
| Source dataset | uspto-grants-1996_02 |
| ORD ID | ord-37e94e2990ee438d815580eae3a60f39 |
| Source note | uspto-grants-1996_02 |