Hydrochloric Acid → HCID 58381722, compound

HRID 410055Notes

Reaction equation

HRID 410055 reaction equation
OO.O.[OH-].[Li+].[CH2:6]([S:26][C@H:27]([CH2:43][CH3:44])[C:28](N1[C@@H](C)[C@@H](C2C=CC=CC=2)OC1=O)=[O:29])[CH2:7][CH2:8][CH2:9]/[CH:10]=[CH:11]\[CH2:12]/[CH:13]=[CH:14]\[CH2:15]/[CH:16]=[CH:17]\[CH2:18]/[CH:19]=[CH:20]\[CH2:21]/[CH:22]=[CH:23]\[CH2:24][CH3:25].[O-:45]S([O-])=O.[Na+].[Na+].Cl>O1CCCC1.O>[CH2:6]([S:26][C@H:27]([CH2:43][CH3:44])[C:28]([OH:29])=[O:45])[CH2:7][CH2:8][CH2:9]/[CH:10]=[CH:11]\[CH2:12]/[CH:13]=[CH:14]\[CH2:15]/[CH:16]=[CH:17]\[CH2:18]/[CH:19]=[CH:20]\[CH2:21]/[CH:22]=[CH:23]\[CH2:24][CH3:25]

Participants

8

Reactant 5

HCID 313Hydrochloric AcidHCID 784Hydrogen PeroxideHCID 24437Sodium SulfiteHCID 168937Lithium hydroxide, monohydrateHCID 58381719HCID 58381719, compound

Product 1

HCID 58381722HCID 58381722, compoundYield 22%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

Hydrogen peroxide (30% in water, 1.04 mL, 10.2 mmol) and lithium hydroxide monohydrate (0.21 g, 5.09 mmol) was added to a solution of (4S,5R)-3-((R)-2-((5Z,8Z,11Z,14Z,17Z)-icosa-5,8,11,14,17-pentaenylthio)butanoyl)-4-methyl-5-phenyloxazolidin-2-one (1.40 g, 2.55 mmol) in tetrahydrofuran (15 mL) and water (5 mL) held at 0° C. under nitrogen. The reaction mixture was stirred at 0° C. for 45 minutes. 10% Na2SO3 (aq) (35 mL) was added, pH was adjusted to ˜2 with 5M HCl and the mixture was extracted twice with heptane (35 mL). The combined organic extract was dried (Na2SO4), filtered and concentrated. The residue was subjected to flash chromatography on silica gel using increasingly polar mixtures of heptane and ethyl acetate (98:8→1:1) as eluent. Concentration of the appropriate fractions afforded 0.17 g (22% yield) of the title product as an oil. 1H-NMR (300 MHz, CDCl3): δ 1.00 (t, 3H), 1.07 (t, 3H), 1.46 (m, 2H), 1.60-1.75 (m, 3H), 1.85 (m, 1H), 2.10 (m, 4H), 2.66 (m, 2H), 2.80-2.90 (m, 8H), 3.21 (t, 1H), 5.35-5.45 (m, 10H); MS (electrospray): 389.3 [M−H]−; [α]D+50° (c=0.14, ethanol).

Workup

  1. customheld at 0° C. under nitrogen
  2. extractionthe mixture was extracted twice with heptane (35 mL)
  3. extractionThe combined organic extract
  4. dry with materialwas dried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. temperatureincreasingly polar mixtures of heptane and ethyl acetate (98:8→1:1) as eluent

Sources & evidence

ORD record
ord-3b2b1e19572e4565a3197b4c9e4338d8
Source dataset
uspto-grants-2014_06
Patent number
US08759558B2

Reaction notes

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