Formaldehyde → 7-(3,4-Dimethyl-1-piperazinyl)-1-ethyl-6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxlic acid

HRID 370715Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 370715
[CH2:1]([N:3]1[C:12]2[C:7](=[CH:8][C:9]([F:21])=[C:10]([N:14]3[CH2:19][CH2:18][NH:17][CH:16]([CH3:20])[CH2:15]3)[C:11]=2[F:13])[C:6](=[O:22])[C:5]([C:23]([OH:25])=[O:24])=[CH:4]1)[CH3:2].[CH2:26]=O>C(O)=O>[CH3:20][CH:16]1[N:17]([CH3:26])[CH2:18][CH2:19][N:14]([C:10]2[C:11]([F:13])=[C:12]3[C:7]([C:6](=[O:22])[C:5]([C:23]([OH:25])=[O:24])=[CH:4][N:3]3[CH2:1][CH3:2])=[CH:8][C:9]=2[F:21])[CH2:15]1

Komponenten

4

Edukt 2

HCID 712FormaldehydeHCID 3948Lomefloxacin

Produkt 1

HCID 134776637-(3,4-Dimethyl-1-piperazinyl)-1-ethyl-6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxlic acid

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 284Formic AcidLösungsmittel

Versuchsvorschrift

A mixture of 1.40 g of 1-ethyl-6,8-difluoro-1,4-dihydro-7-(3-methyl-1-piperazinyl)-4-oxoquinoline-3-carboxylic acid, 2.8 ml of 90% formic acid and 2.2 ml of 37% formalin was heated for 4 hours under reflux. The reaction mixture was evaporated and the residue was dissolved in water. The solution was neutralized with aqueous sodium bicarbonate. The precipitate was filtered and recrystallized from ethanol to give 0.32 g of the title compound as colorless needles, M.p. 211.5°-212° C.

Aufarbeitung

  1. temperaturewas heated for 4 hours
  2. temperatureunder reflux
  3. customThe reaction mixture was evaporated
  4. dissolutionthe residue was dissolved in water
  5. filtrationThe precipitate was filtered
  6. customrecrystallized from ethanol

Quellen und Nachweise

ORD-Eintrag
ord-841b7245c77b43c88fd1851b8beb19af
Quelldatensatz
uspto-grants-1985_07
Patentnummer
US04528287

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