3,4-Hexanedione → HCID 10159646, Verbindung

HRID 1167374Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1167374
[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([O:11][CH2:12][C@@H:13]2[O:18][C:17]3[C:19]([NH2:24])=[C:20]([NH2:23])[CH:21]=[CH:22][C:16]=3[O:15][CH2:14]2)(=[O:10])=[O:9])=[CH:4][CH:3]=1.[CH3:25][CH2:26][C:27](=O)[C:28](=O)[CH2:29][CH3:30]>O.C(O)C.C(=O)([O-])O.[Na+]>[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([O:11][CH2:12][CH:13]2[O:18][C:17]3=[C:19]4[C:20](=[CH:21][CH:22]=[C:16]3[O:15][CH2:14]2)[N:23]=[C:28]([CH2:29][CH3:30])[C:27]([CH2:26][CH3:25])=[N:24]4)(=[O:10])=[O:9])=[CH:4][CH:3]=1

Komponenten

6

Edukt 2

HCID 625393,4-HexanedioneHCID 11302542HCID 11302542, Verbindung

Produkt 1

HCID 10159646HCID 10159646, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 702EthanolLösungsmittelHCID 962WaterLösungsmittelHCID 516892Sodium BicarbonateLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To a solution of [(2R)-7,8-diamino-2,3-dihydro-1,4-benzodioxin-2-yl]-methyl 4-methylbenzenesulfonate (2.226 g, 5.258 mmole) in water (50 mL) was added a solution of 3,4-hexanedione (0.750 g, 6.572 mmole) in ethyl alcohol (50 mL) and the reaction mixture was heated at 60° C. for 3 hours. The reaction mixture was allowed to cool to room temperature and was diluted with aqueous sodium hydrogen carbonate (250 mL) and extracted with ethyl acetate (2×100 mL). The combined organic extracts were washed with water (100 mL), aqueous sodium chloride (100 mL), dried (magnesium sulfate) and the solvent was removed in vacuo to give a crude solid. Purification by flash column chromatography (silica, ethyl acetate:hexanes 7:3) gave 1.796 g (80%) of the (R)-enantiomer of the title compound as a tan crystalline solid. Rf=0.85 (silica, ethyl acetate:hexanes 7:3); mp 132-135° C.

Aufarbeitung

  1. temperatureto cool to room temperature
  2. extractionextracted with ethyl acetate (2×100 mL)
  3. washThe combined organic extracts were washed with water (100 mL), aqueous sodium chloride (100 mL)
  4. dry with materialdried (magnesium sulfate)
  5. customthe solvent was removed in vacuo
  6. customto give a crude solid
  7. customPurification by flash column chromatography (silica, ethyl acetate:hexanes 7:3)

Quellen und Nachweise

ORD-Eintrag
ord-b8fa5ff0a3594aeeaaead17eedcd41ce
Quelldatensatz
uspto-grants-2003_09
Patentnummer
US06617327B2

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