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Methanol → 7-[2-(2-Formamidothiazol-4-yl)-2-n-propoxyiminoacetamido)-3-chloro-3-cephem-4-carboxylic acid

HRID 364554
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 364554
[CH:1]([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:36][O:37][CH2:38][CH2:39][CH3:40])[C:10]([NH:12][CH:13]2[C:34](=[O:35])[N:15]3[C:16]([C:21]([O:23]CC4C=CC([N+]([O-])=O)=CC=4)=[O:22])=[C:17]([Cl:20])[CH2:18][S:19][C@H:14]23)=[O:11])[N:8]=1)=[O:2].CO.O>[C].[Pd].O1CCCC1>[CH:1]([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:36][O:37][CH2:38][CH2:39][CH3:40])[C:10]([NH:12][CH:13]2[C:34](=[O:35])[N:15]3[C:16]([C:21]([OH:23])=[O:22])=[C:17]([Cl:20])[CH2:18][S:19][C@H:14]23)=[O:11])[N:8]=1)=[O:2]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 3

HCID 887MethanolHCID 962WaterHCID 1317124674-Nitrobenzyl 7-[2-(2-formamidothiazol-4-yl)-2-n-propoxyiminoacetamido]-3-chloro-3-cephem-4-carboxylate

Produkt 1

HCID 1317124687-[2-(2-Formamidothiazol-4-yl)-2-n-propoxyiminoacetamido)-3-chloro-3-cephem-4-carboxylic acidAusbeute 85,7 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418390
HCID 178418390, Verbindung
Katalysator
HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

A suspension of 4-nitrobenzyl 7-[2-(2-formamidothiazol-4-yl)-2-n-propoxyiminoacetamido]-3-chloro-3-cephem-4-carboxylate (syn isomer, 2.4 g.), 10% palladium carbon (1.0 g.), methanol (24 ml.), water (3.6 ml.) and tetrahydrofuran (48 ml.) was subjected to catalytic reduction under ordinary pressure at room temperature. After removing insoluble substance by filtration, the filtrate was concentrated in vacuo. Water and ethyl acetate were added to the residue, and subjected to pH 8 with a saturated aqueous solution of sodium bicarbonate. The insoluble substance was removed by filtration, and the aqueous layer was separated. Ethyl acetate was added to the solution, adjusted to pH 2.0 with hydrochloric acid and extracted with ethyl acetate. The ethyl acetate solution and extract were combined together, washed with a saturated aqueous solution of sodium chloride and dried over magnesium sulfate. The solution was concentrated in vacuo, and the residue was triturated with diethyl ether and collected by filtration to give 7-[2-(2-formamidothiazol-4-yl)-2-n-propoxyiminoacetamido]-3-chloro-3-cephem-4-carboxylic acid (syn isomer, 1.6 g.).

Aufarbeitung

  1. customwas subjected to catalytic reduction under ordinary pressure at room temperature
  2. customAfter removing insoluble substance
  3. filtrationby filtration
  4. concentrationthe filtrate was concentrated in vacuo
  5. additionWater and ethyl acetate were added to the residue
  6. customThe insoluble substance was removed by filtration
  7. customthe aqueous layer was separated
  8. additionEthyl acetate was added to the solution
  9. extractionextracted with ethyl acetate
  10. extractionThe ethyl acetate solution and extract
  11. washwashed with a saturated aqueous solution of sodium chloride
  12. dry with materialdried over magnesium sulfate
  13. concentrationThe solution was concentrated in vacuo
  14. customthe residue was triturated with diethyl ether
  15. filtrationcollected by filtration

Quellen und Nachweise

ORD-Eintrag
ord-de9c79cb21d14d5bb0840978c876973f
Quelldatensatz
uspto-grants-1986_08
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US04604456

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