Methanol → HCID 178477374, Verbindung

HRID 1395405Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1395405
P(Cl)(Cl)(Cl)(Cl)Cl.N1C=CC=CC=1.[CH:13]([O:26][C:27]([C:29]1[N:34]2[C:35](=[O:46])[C@@H:36]([NH:37]C(=O)CC3SC=CC=3)[C@H:33]2[S:32][CH2:31][C:30]=1[CH:47]([S:49][C:50]1[NH:54][N:53]=[N:52][N:51]=1)[CH3:48])=[O:28])([C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1)[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1.CO>C(Cl)Cl.O>[CH:13]([O:26][C:27]([C:29]1[N:34]2[C:35](=[O:46])[CH:36]([NH2:37])[C@H:33]2[S:32][CH2:31][C:30]=1[CH:47]([S:49][C:50]1[NH:54][N:53]=[N:52][N:51]=1)[CH3:48])=[O:28])([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)[C:20]1[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=1

Komponenten

7

Edukt 4

HCID 887MethanolHCID 1049PyridineHCID 24819Phosphorus pentachlorideHCID 178477370HCID 178477370, Verbindung

Produkt 1

HCID 178477374HCID 178477374, VerbindungAusbeute 64 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 6344DichloromethaneLösungsmittel3×

Reaktionsbedingungen

Temperatur
-10 °C

Versuchsvorschrift

To a suspension of 6.25 g of phosphorus pentachloride in 45 ml of anhydrous methylene chloride cooled at -10° C., is added 20 ml of anhydrous methylene chloride solution containing 2.4 g of pyridine and the mixed solution is stirred for 30 minutes. To the solution is dropwise added a solution of 9.3 g of 7β-(2-thienylacetamido)-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid benzhydryl ester in 30 ml of anhydrous methylene chloride during 30 minutes under stirring and keeping at -20° C.--10° C. The mixture is further stirred for 2 hours at the same temperature and then cooled to -30° C.--20° C., followed by adding dropwise 56 ml of methanol. Thus obtained solution is stirred for 30 minutes, keeping the temperature of the solution between -5° C. and 5° C., and 60 ml of water is added dropwise thereto, followed by further stirring for 30 minutes. Methylene chloride layer is washed with saturated aq. NaCl solution and concentrated. To the concentrate is added a mixture of water and ethyl acetate under stirring to give 4.746 g of 7-amino-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid benzhydryl ester as a crystal Yield 64.0%.

Aufarbeitung

  1. stirringunder stirring
  2. customkeeping at -20° C.--10° C
  3. stirringThe mixture is further stirred for 2 hours at the same temperature
  4. temperaturecooled to -30° C.--20° C.
  5. stirringThus obtained solution is stirred for 30 minutes
  6. additionis added dropwise
  7. stirringby further stirring for 30 minutes
  8. washMethylene chloride layer is washed with saturated aq. NaCl solution
  9. concentrationconcentrated
  10. additionTo the concentrate is added
  11. additiona mixture of water and ethyl acetate
  12. stirringunder stirring

Quellen und Nachweise

ORD-Eintrag
ord-bfc7243f169d44f9a025815d3fb0ba20
Quelldatensatz
uspto-grants-1980_05
Patentnummer
US04203899

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