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Formaldehyde → 1-Cyclopropyl-7-(3,4-dimethyl-1-piperazinyl)-6-fluoro-8-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

HRID 1638694
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HRID 1638694 반응식
[CH:1]1([N:4]2[C:13]3[C:8](=[CH:9][C:10]([F:22])=[C:11]([N:15]4[CH2:20][CH2:19][NH:18][CH:17]([CH3:21])[CH2:16]4)[C:12]=3[CH3:14])[C:7](=[O:23])[C:6]([C:24]([OH:26])=[O:25])=[CH:5]2)[CH2:3][CH2:2]1.C=O.[CH:29]([O-])=O.[Na+].C(=O)([O-])O.[Na+]>C(O)=O>[CH:1]1([N:4]2[C:13]3[C:8](=[CH:9][C:10]([F:22])=[C:11]([N:15]4[CH2:20][CH2:19][N:18]([CH3:29])[CH:17]([CH3:21])[CH2:16]4)[C:12]=3[CH3:14])[C:7](=[O:23])[C:6]([C:24]([OH:26])=[O:25])=[CH:5]2)[CH2:3][CH2:2]1
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참가 물질

6

반응물 4

HCID 712FormaldehydeHCID 516892Sodium BicarbonateHCID 2723810Sodium FormateHCID 140525871-Cyclopropyl-7-(3-methyl-1-piperazinyl)-6-fluoro-8-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

생성물 1

HCID 156225181-Cyclopropyl-7-(3,4-dimethyl-1-piperazinyl)-6-fluoro-8-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid수율 28.9%

시약·촉매·용매

1
HCID 284Formic Acid용매

실험 절차

To 1-cyclopropyl-7-(3-methyl-1-piperazinyl)-6-fluoro-8-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid (0.4 g) are added formic acid (3 ml), 37% formalin (3 ml) and sodium formate (0.4 g), and the mixture is refluxed for 5 hours. After cooling, the reaction mixture is poured into ice water and adjusted to below pH 8 with aqueous sodium hydrogen carbonate, and the mixture is extracted with dichloromethane. After removing the solvent by concentration, the resulting residue is recrystallized from ethyl acetate to give 1-cyclopropyl-7-(3,4-dimethyl-1-piperazinyl)-6-fluoro-8-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid (0.12 g), as pale yellow powder, m.p. 181°-183° C.

후처리

  1. temperaturethe mixture is refluxed for 5 hours
  2. temperatureAfter cooling
  3. extractionthe mixture is extracted with dichloromethane
  4. customAfter removing the solvent
  5. concentrationby concentration
  6. customthe resulting residue is recrystallized from ethyl acetate

출처 및 근거

ORD 기록
ord-bd9cb81828ca470fa0371ea0e92d6d04
출처 데이터셋
uspto-grants-1989_11
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US04880806

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