Hydrogen Peroxide → (S)-2-((R)-2-Methyl-butyl)-succinic Acid 4-tert-butyl Ester

HRID 458035Notes

Reaction equation

HRID 458035 reaction equation
[C:1]([O:5][C:6](=[O:29])[CH2:7][C@@H:8]([C:14](N1[C@H](C)[C@H](C2C=CC=CC=2)OC1=O)=[O:15])[CH2:9][C@H:10]([CH3:13])[CH2:11][CH3:12])([CH3:4])([CH3:3])[CH3:2].[Li+].[OH-].OO.S(=O)(O)[O-:35].[Na+].S([O-])([O-])=O.[Na+].[Na+]>O.C1COCC1>[C:1]([O:5][C:6](=[O:29])[CH2:7][C@H:8]([CH2:9][C@H:10]([CH3:13])[CH2:11][CH3:12])[C:14]([OH:15])=[O:35])([CH3:2])([CH3:3])[CH3:4]

Participants

8

Reactant 5

HCID 784Hydrogen PeroxideHCID 3939Lithium HydroxideHCID 24437Sodium SulfiteHCID 23665763Sodium BisulfiteHCID 66939639(3S,5R)-5-Methyl-3-[1-((4R,5S)-4-methyl-2-oxo-5-phenyl-oxazolidin-3-yl)-methanoyl]-heptanoic acid tert-butyl ester

Product 1

HCID 54311211(S)-2-((R)-2-Methyl-butyl)-succinic Acid 4-tert-butyl EsterYield 100%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 8028TetrahydrofuranSolvent

Procedure

To ester 112 (7.26 g, 0.018 mol) in H2O (53 mL) and THF (176 mL) at 0° C. was added a premixed solution of LiOH (37 mL of a 0.8 M solution) and H2O2 (10.57 mL of a 30% solution) and the solution warmed to room temperature. After 2 hours sodium bisulfite (7 g), sodium sulfite (13 g), and water (60 mL) was added and the two layers were separated and the aqueous layer extracted with ether. The combined organic phases were concentrated to an oil that was dissolved in heptane (200 mL). The resultant solid was filtered off and the filtrate dried (MgSO4) and concentrated to afford an oil (4.4 g) that was used without further purification.

Workup

  1. customthe two layers were separated
  2. extractionthe aqueous layer extracted with ether
  3. concentrationThe combined organic phases were concentrated to an oil that
  4. dissolutionwas dissolved in heptane (200 mL)
  5. filtrationThe resultant solid was filtered off
  6. dry with materialthe filtrate dried (MgSO4)
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-dbe614aca2fd4927966468d90872d847
Source dataset
uspto-grants-2007_03
Patent number
US07189747B2

Reaction notes

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