Hydrogen Peroxide → (S)-tert-Butyl 4-((R)-2-(((tert-butyldimethylsilyl)oxy)methyl)-5-hydroxypentyl)-2,2-dimethyloxazolidine-3-carboxylate

HRID 451972Notes

Reaction equation

HRID 451972 reaction equation
[Si:1]([O:8][CH2:9][C@H:10]([CH2:26][CH:27]=[CH2:28])[CH2:11][C@H:12]1[CH2:16][O:15][C:14]([CH3:18])([CH3:17])[N:13]1[C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].S(C)C.[OH-:32].[Na+].OO>C1COCC1.C(OCC)C>[Si:1]([O:8][CH2:9][C@H:10]([CH2:26][CH2:27][CH2:28][OH:32])[CH2:11][C@H:12]1[CH2:16][O:15][C:14]([CH3:17])([CH3:18])[N:13]1[C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])([C:4]([CH3:7])([CH3:5])[CH3:6])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 784Hydrogen PeroxideHCID 1068Dimethyl SulfideHCID 14798Sodium HydroxideHCID 58011479(S)-tert-Butyl 4-((R)-2-(((tert-butyldimethylsilyl)oxy)methyl)pent-4-en-1-yl)-2,2-dimethyloxazolidine-3-carboxylate

Product 1

HCID 58011529(S)-tert-Butyl 4-((R)-2-(((tert-butyldimethylsilyl)oxy)methyl)-5-hydroxypentyl)-2,2-dimethyloxazolidine-3-carboxylateYield 72%

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 8028TetrahydrofuranSolvent

Procedure

A solution of (S)-tert-butyl 4-((R)-2-((tert-butyldimethylsilyloxy)methyl)pent-4-enyl)-2,2-dimethyloxazolidine-3-carboxylate (26 g, 63 mmol) in THF (200 mL) was cooled in an ice-bath, followed by dropwise addition of 10 M BH3.SMe2 (6.3 mL). After stirring for 5 hr, 10% NaOH solution (32 mL) followed by 30% H2O2 (32 mL) were added carefully. The reaction mixture was stirred at rt for 16 hr. The reaction mixture was diluted with diethyl ether (500 mL) and the aqueous layer was extracted with diethyl ether (3×250 mL). The combined organic layers were washed with brine, dried over Na2SO4, filtered and concentrated to give the crude product, which was purified by column chromatography to afford (S)-tert-butyl 4-((R)-2-((tert-butyldimethylsilyloxy)methyl)-5-hydroxypentyl)-2,2-dimethyloxazolidine-3-carboxylate (19.6 g, 72%).

Workup

  1. additionwere added carefully
  2. stirringThe reaction mixture was stirred at rt for 16 hr
  3. extractionthe aqueous layer was extracted with diethyl ether (3×250 mL)
  4. washThe combined organic layers were washed with brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customto give the crude product, which
  9. customwas purified by column chromatography

Sources & evidence

ORD record
ord-54aee8273da94e16a0be0a2e0756c081
Source dataset
uspto-grants-2013_07
Patent number
US08487108B2

Reaction notes

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