Sodium Hydroxide → Sodium 7-[2-(2-amino-4-thiazolyl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylate

HRID 364523Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 364523
[OH-].[Na+:2].[NH2:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:25][O:26][CH3:27])[C:10]([NH:12][CH:13]2[C:23](=[O:24])[N:15]3[C:16]([C:20]([OH:22])=[O:21])=[CH:17][CH2:18][S:19][C@H:14]23)=[O:11])[N:8]=1>O>[NH2:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:25][O:26][CH3:27])[C:10]([NH:12][CH:13]2[C:23](=[O:24])[N:15]3[C:16]([C:20]([O-:22])=[O:21])=[CH:17][CH2:18][S:19][C@H:14]23)=[O:11])[N:8]=1.[Na+:2]

Komponenten

4

Edukt 2

HCID 14798Sodium HydroxideHCID 1317124447-[2-(2-Amino-4-thiazolyl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylic acid

Produkt 1

HCID 131712445Sodium 7-[2-(2-amino-4-thiazolyl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Versuchsvorschrift

An Aqueous solution of sodium hydroxide was carefully added dropwise to a stirred suspension of 7-[2-(2-aminothiazol-4-yl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylic acid (syn isomer, 52 g.) in water (100 ml.) below 5° C. to make a solution of pH 7.0 to 7.5. After filtration and washing, the combined filtrate and the washings (200 ml.) was added dropwise to ethanol (2 l.) under stirring over 30 minutes, and stirring at room temperature for 15 minutes and then at 5° to 10° C. for an hour. The precipitates were collected by filtration, washed with ethanol (200 ml.) and dried in vacuo at 30° C. to give amorphous sodium 7-[2-(2-aminothiazol-4-yl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylate (syn isomer, 46.3 g.).

Aufarbeitung

  1. filtrationAfter filtration
  2. washwashing
  3. additionthe combined filtrate and the washings (200 ml.) was added dropwise to ethanol (2 l.)
  4. stirringstirring at room temperature for 15 minutes
  5. waitat 5° to 10° C. for an hour
  6. filtrationThe precipitates were collected by filtration
  7. washwashed with ethanol (200 ml.)
  8. customdried in vacuo at 30° C.

Quellen und Nachweise

ORD-Eintrag
ord-03522a9cb26c4efd9fc345d0c5ca89a2
Quelldatensatz
uspto-grants-1986_08
Patentnummer
US04604456

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