Propylene Oxide → (3R,4R)-3-[2-(2-chloroacetamidothiazol-4-yl)-2-methoxyiminoacetamido]-4-methylsulfonyl-2-oxoazetidine

HRID 978834Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 978834
O=C(Cl)OC(Cl)(Cl)Cl.[Cl:9][CH2:10][C:11]([NH:13][C:14]1[S:15][CH:16]=[C:17]([C:19](=[N:23][O:24][CH3:25])[C:20]([OH:22])=O)[N:18]=1)=[O:12].[NH2:26][C@H:27]1[C@@H:30]([S:31]([CH3:34])(=[O:33])=[O:32])[NH:29][C:28]1=[O:35].C1OC1C>C(Cl)Cl.CC(N(C)C)=O.C(N(CC)CC)C.CN(C=O)C>[Cl:9][CH2:10][C:11]([NH:13][C:14]1[S:15][CH:16]=[C:17]([C:19](=[N:23][O:24][CH3:25])[C:20]([NH:26][C@H:27]2[C@@H:30]([S:31]([CH3:34])(=[O:33])=[O:32])[NH:29][C:28]2=[O:35])=[O:22])[N:18]=1)=[O:12]

Komponenten

9

Edukt 4

HCID 6378Propylene OxideHCID 10426DiphosgeneHCID 581157C8H8ClN3O4SHCID 53637648(3R,4R)-3-amino-4-methylsulfonyl-2-oxoazetidine

Produkt 1

HCID 53860321(3R,4R)-3-[2-(2-chloroacetamidothiazol-4-yl)-2-methoxyiminoacetamido]-4-methylsulfonyl-2-oxoazetidineAusbeute 70,2 %

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 6228DimethylformamideLösungsmittelHCID 6344DichloromethaneLösungsmittel2×HCID 8471TriethylamineLösungsmittel2×HCID 31374DimethylacetamideLösungsmittel

Versuchsvorschrift

To a solution of 0.122 g of DMF in 5 ml of methylene chloride is added 0.10 ml of diphosgene at -10° C. The mixture is stirred for 30 minutes at room temperature, then cooled to a temperature of -70° C., followed by dropwise addition of 10 ml of methylene chloride solution containing 0.427 g of 2-(2-chloroacetamidothiazol-4-yl)-2-methoxyiminoacetic acid and 0.17 g of triethylamine. The mixture is stirred for 2 hours at a temperature ranging from -25° to -20° C., which is cooled to a temperature of -70° C., to which are added 0.17 g of triethylamine, a solution of 0.229 g of (3R,4R)-3-amino-4-methylsulfonyl-2-oxoazetidine in 3 ml of DMA, and 2 ml of propylene oxide, successively. The temperature of the mixture is raised up to room temperature in the course of 1.5 hours. The reaction mixture is concentrated under reduced pressure, and the residue is purified on a silica-gel column (ethyl acetate:n-hexane=1:1) to give 0.415 g of (3R,4R)-3-[2-(2-chloroacetamidothiazol-4-yl)-2-methoxyiminoacetamido]-4-methylsulfonyl-2-oxoazetidine. This is in agreement with the compound (syn-isomer) obtained in Reference Example 15B in IR and NMR.

Aufarbeitung

  1. temperaturecooled to a temperature of -70° C.
  2. stirringThe mixture is stirred for 2 hours at a temperature
  3. customranging from -25° to -20° C.
  4. temperaturewhich is cooled to a temperature of -70° C., to which
  5. temperatureThe temperature of the mixture is raised up to room temperature in the course of 1.5 hours
  6. concentrationThe reaction mixture is concentrated under reduced pressure
  7. customthe residue is purified on a silica-gel column (ethyl acetate:n-hexane=1:1)

Quellen und Nachweise

ORD-Eintrag
ord-3dd6a1574cc8439db1cc5d1a0210f61c
Quelldatensatz
uspto-grants-1987_05
Patentnummer
US04665067

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