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Sodium Bicarbonate → racemic tert-butyl ((5RS,6RS)-5-(2-fluoro-5-nitrophenyl)-6-(2-hydroxyethyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate

HRID 627597
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 627597
[CH2:1]([CH:4]1[S:9](=[O:11])(=[O:10])[C:8]([CH3:13])([CH3:12])[C:7]([NH:14][C:15](=[O:21])[O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[N:6][C:5]1([C:23]1[CH:28]=[C:27]([N+:29]([O-:31])=[O:30])[CH:26]=[CH:25][C:24]=1[F:32])[CH3:22])[CH:2]=C.C(=O)(O)[O-:34].[Na+].[BH4-].[Na+]>C(Cl)Cl.CO>[F:32][C:24]1[CH:25]=[CH:26][C:27]([N+:29]([O-:31])=[O:30])=[CH:28][C:23]=1[C:5]1([CH3:22])[CH:4]([CH2:1][CH2:2][OH:34])[S:9](=[O:11])(=[O:10])[C:8]([CH3:13])([CH3:12])[C:7]([NH:14][C:15](=[O:21])[O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[N:6]1
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Komponenten

6

Edukt 3

HCID 516892Sodium BicarbonateHCID 4311764Sodium borohydrideHCID 86728096tert-butyl ((5RS,6SR)-6-allyl-5-(2-fluoro-5-nitrophenyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate

Produkt 1

HCID 131735324racemic tert-butyl ((5RS,6RS)-5-(2-fluoro-5-nitrophenyl)-6-(2-hydroxyethyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamateAusbeute 99 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A solution of tert-butyl ((5RS,6RS)-6-allyl-5-(2-fluoro-5-nitrophenyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate (120 mg, 0.256 mmol) in DCM (1.8 ml) and MeOH (0.6 ml) was cooled to −78° C., and sodium bicarbonate (42.9 mg, 0.511 mmol) was added and the mixture was ozonolyzed for 10 min. Oxygen was bubbled through the solution for 2 min, then solid sodium borohydride (14.5 mg, 0.383 mmol) was added to the mixture and the mixture was removed from the cooling bath and was allowed to reach RT and stirred for 30 min. The reaction was quenched with sat. solution of NH4Cl and extracted with EtOAc. The organic layer was washed with brine, dried over MgSO4 and concentrated to afford crude racemic tert-butyl ((5RS,6RS)-5-(2-fluoro-5-nitrophenyl)-6-(2-hydroxyethyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate (120 mg, 0.253 mmol, 99% yield) which was used without further purification.

Aufarbeitung

  1. customOxygen was bubbled through the solution for 2 min
  2. customthe mixture was removed from the cooling bath
  3. customto reach RT
  4. customThe reaction was quenched with sat. solution of NH4Cl
  5. extractionextracted with EtOAc
  6. washThe organic layer was washed with brine
  7. dry with materialdried over MgSO4
  8. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-66ef482e419a40d4a03e8226011ce94e
Quelldatensatz
uspto-grants-2016_04
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US09309263B2

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