Acetone → 4-Methylheptanoic acid, (-)-

HRID 458029

Reaktionsgleichung

Reaktionsgleichung von HRID 458029
[CH3:1][C:2](=[CH:4][CH2:5][CH2:6][C@H](C)CCC)[CH3:3].[OH2:12].C[C:14]([CH3:16])=[O:15]>OS(O)(=O)=O.[Cl-].[Na+].O>[CH3:1][C@H:2]([CH2:4][CH2:5][CH3:6])[CH2:3][CH2:16][C:14]([OH:12])=[O:15]

Komponenten

6

Edukt 3

HCID 180AcetoneHCID 962Water2×HCID 15345839(6R)-2,6-Dimethylnon-2-ene

Produkt 1

HCID 138003704-Methylheptanoic acid, (-)-

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 1118Sulfuric AcidLösungsmittel2×HCID 57417360Sodium chloride; waterLösungsmittel

Versuchsvorschrift

To alkene 98 (20 g, 0.13 mol) in acetone (433 mL) was added a solution of CrO3 (39 g, 0.39 mol) in H2SO4 (33 mL)/H2O (146 mL) over 50 minutes. After 6 hours a further amount of CrO3 (26 g, 0.26 mol) in H2SO4 (22 mL)/H2O (100 mL) was added. After 12 hours the solution was diluted with brine and the solution extracted with ether. The combined organic phases were dried (MgSO4) and concentrated. Flash chromatography (gradient of 6:1 to 2:1 hexane/EtOAc) gave the product 99 as an oil. 12.1 g; 65%. MS, m/z (relative intensity): 143 [M−H, 100%].

Aufarbeitung

  1. extractionthe solution extracted with ether
  2. dry with materialThe combined organic phases were dried (MgSO4)
  3. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-340128ee1dc44507a0c4fc4e5096a630
Quelldatensatz
uspto-grants-2007_03
Patentnummer
US07189747B2

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