Water → 4-tert-butyl 7-methyl (6R,7R)-6-(3,4-dichlorophenyl)-1,4-oxazepane-4,7-dicarboxylate

HRID 1022807Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1022807
[C:1]([O:5][C:6]([N:8]1[CH2:14][C@@H:13]([C:15]2[CH:20]=[CH:19][C:18]([Cl:21])=[C:17]([Cl:22])[CH:16]=2)[C@H:12]([C:23]([OH:25])=[O:24])[O:11][CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:26](=O)([O-])[O-].[K+].[K+].CI.O>CN(C=O)C>[Cl:22][C:17]1[CH:16]=[C:15]([C@H:13]2[C@H:12]([C:23]([O:25][CH3:26])=[O:24])[O:11][CH2:10][CH2:9][N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:2])[CH3:3])=[O:7])[CH2:14]2)[CH:20]=[CH:19][C:18]=1[Cl:21]

Komponenten

6

Edukt 4

HCID 962WaterHCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 66976870(6R,7R)-4-(tert-butoxycarbonyl)-6-(3,4-dichlorophenyl)-1,4-oxazepane-7-carboxylic acid

Produkt 1

HCID 866638784-tert-butyl 7-methyl (6R,7R)-6-(3,4-dichlorophenyl)-1,4-oxazepane-4,7-dicarboxylateAusbeute 88,8 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

To a solution of (6R,7R)-4-(tert-butoxycarbonyl)-6-(3,4-dichlorophenyl)-1,4-oxazepane-7-carboxylic acid (3.11 g) in DMF (10 mL) were added potassium carbonate (1.32 g) and methyl iodide (0.748 mL). The mixture was stirred at room temperature for 2 hr under nitrogen purging, water was added, and the mixture was extracted with ethyl acetate. The organic layer was washed with brine, and dried over anhydrous magnesium sulfate, and the solvent was evaporated. The residue was purified by silica gel column chromatography (eluent; hexane:ethyl acetate (0%-50%)) to give the title compound (2.86 g) as a colorless oil.

Aufarbeitung

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customthe solvent was evaporated
  5. customThe residue was purified by silica gel column chromatography (eluent; hexane:ethyl acetate (0%-50%))

Quellen und Nachweise

ORD-Eintrag
ord-6d81750b8d7c4e689b72e9fc36a8df02
Quelldatensatz
uspto-grants-2014_05
Patentnummer
US08722662B2

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