Sodium Bicarbonate → cis-3-[2-(2-Chloroacetamido-4-thiazolyl)-2-methoxyiminoacetamido]-4-hydroxymethyl-2-oxoazetidine

HRID 621150Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 621150
[NH2:1][C@H:2]1[C@@H:5]([CH2:6][OH:7])[NH:4][C:3]1=[O:8].C(=O)([O-])O.[Na+].Cl.[Cl:15][CH2:16][C:17]([NH:19][C:20]1[S:21][CH:22]=[C:23](/[C:25](=[N:29]/[O:30][CH3:31])/[C:26](Cl)=[O:27])[N:24]=1)=[O:18]>O1CCCC1.O>[Cl:15][CH2:16][C:17]([NH:19][C:20]1[S:21][CH:22]=[C:23]([C:25](=[N:29][O:30][CH3:31])[C:26]([NH:1][C@H:2]2[C@@H:5]([CH2:6][OH:7])[NH:4][C:3]2=[O:8])=[O:27])[N:24]=1)=[O:18]

Komponenten

6

Edukt 3

HCID 516892Sodium Bicarbonate2×HCID 12884125(2Z)-2-[2-[(2-chloroacetyl)amino]-1,3-thiazol-4-yl]-2-methoxyiminoacetyl chloride;hydrochlorideHCID 20632011cis-3-Amino-4-hydroxymethyl-2-oxoazetidine

Produkt 1

HCID 86740477cis-3-[2-(2-Chloroacetamido-4-thiazolyl)-2-methoxyiminoacetamido]-4-hydroxymethyl-2-oxoazetidine

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

In a mixture of 2 ml of tetrahydrofuran and 2 ml of water is dissolved 75 mg of cis-3-amino-4-hydroxymethyl-2-oxoazetidine as obtained in Reference Example 53C and, under ice-cooling and stirring 168 mg of sodium hydrogen carbonate and then 332 mg of 2-(2-chloroacetamido-4-thiazolyl)-(Z)-2-methoxyiminoacetyl chloride hydrochloride are added. The mixture is stirred under ice-cooling for one hour and the reaction mixture is made neutral with aqueous sodium hydrogen carbonate and extracted with ethyl acetate-tetrahydrofuran (2:1). The extract is washed with saturated aqueous sodium chloride and dried over anhydrous magnesium sulfate. The solvent is then distilled off under reduced pressure and, after addition of ethyl acetate-ether (1:2), the crystalline residue is recovered by filtration to give cis-3-[2-(2-chloroacetamido-4-thiazolyl)-2-methoxyiminoacetamido]-4-hydroxymethyl-2-oxoazetidine (syn-isomer) as colorless crystals, m.p. 238°-241° C. (decomp.).

Aufarbeitung

  1. customas obtained in Reference Example 53C and, under ice-
  2. temperaturecooling
  3. temperaturecooling for one hour
  4. extractionextracted with ethyl acetate-tetrahydrofuran (2:1)
  5. washThe extract is washed with saturated aqueous sodium chloride
  6. dry with materialdried over anhydrous magnesium sulfate
  7. distillationThe solvent is then distilled off under reduced pressure
  8. additionafter addition of ethyl acetate-ether (1:2)
  9. filtrationthe crystalline residue is recovered by filtration

Quellen und Nachweise

ORD-Eintrag
ord-9b4febf04ce949119eb2ac5d50ae8cfc
Quelldatensatz
uspto-grants-1989_04
Patentnummer
US04822788

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