Hydrochloric Acid → HCID 58381683, compound

HRID 410053Notes

Reaction equation

[CH2:1]([S:21][CH:22]([CH2:28][CH3:29])[C:23]([O:25]CC)=[O:24])[CH2:2][CH2:3][CH2:4]/[CH:5]=[CH:6]\[CH2:7]/[CH:8]=[CH:9]\[CH2:10]/[CH:11]=[CH:12]\[CH2:13]/[CH:14]=[CH:15]\[CH2:16]/[CH:17]=[CH:18]\[CH2:19][CH3:20].[Li+].[OH-].Cl>C(O)C.O>[CH2:1]([S:21][CH:22]([CH2:28][CH3:29])[C:23]([OH:25])=[O:24])[CH2:2][CH2:3][CH2:4]/[CH:5]=[CH:6]\[CH2:7]/[CH:8]=[CH:9]\[CH2:10]/[CH:11]=[CH:12]\[CH2:13]/[CH:14]=[CH:15]\[CH2:16]/[CH:17]=[CH:18]\[CH2:19][CH3:20]

Participants

Conditions

Temperature: 70 °C

Procedure

Ethyl 2-((5Z,8Z,11Z,14Z,17Z)-icosa-5,8,11,14,17-pentaenylthio)butanoate (209 mg, 0.50 mmol) was dissolved in ethanol (2.5 mL) and added to a solution of LiOH×H2O (168 mg, 4.0 mmol) in water (2.5 mL). The resulting turbid solution was stirred at 70° C. under inert atmosphere for 2 hours, cooled and added water (10 mL) and 1 M HCl (5 mL) to pH=1-2. The mixture was extracted with heptane (2×20 mL) and diethyl ether (20 mL). The combined organic extracts were dried (MgSO4), filtered and concentrated under reduced pressure to give 154 mg of the title compound as crude oil. Purification by flash chromatography on silica gel using gradient elution (starting with pure heptane and increasing stepwise to heptane:EtOAc (with 5% HOAc) 80:20) afforded 151 mg (77% yield) of the title compound as oil.

Workup

temperaturecooled
extractionThe mixture was extracted with heptane (2×20 mL) and diethyl ether (20 mL)
dry with materialThe combined organic extracts were dried (MgSO4)
filtrationfiltered
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-1969cf152b55474fafd82aeaa00f9f89
Source dataset: uspto-grants-2014_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08759558B2

Reaction notes

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