Lithium Hydroxide → HCID 22315251, compound

HRID 430286Notes

Reaction equation

C[O:2][C:3](=[O:25])[CH:4]([C:11]1[CH:16]=[CH:15][C:14]([S:17]([CH3:20])(=[O:19])=[O:18])=[C:13]([S:21]([CH3:24])(=[O:23])=[O:22])[CH:12]=1)[CH2:5][CH:6]1[CH2:10][CH2:9][CH2:8][CH2:7]1.[OH-].[Li+]>O1CCCC1>[CH3:24][S:21]([C:13]1[CH:12]=[C:11]([CH:4]([CH2:5][CH:6]2[CH2:7][CH2:8][CH2:9][CH2:10]2)[C:3]([OH:25])=[O:2])[CH:16]=[CH:15][C:14]=1[S:17]([CH3:20])(=[O:19])=[O:18])(=[O:23])=[O:22]

Participants

Conditions

Temperature: 25 °C

Procedure

A solution of 2-(3,4-bis-methanesulfonyl-phenyl)-3-cyclopentyl-propionic acid methyl ester (1.17 g, 3.01 mmol) in tetrahydrofuran (12 mL) was treated with a 0.8M aqueous lithium hydroxide solution (5.6 mL, 4.52 mmol). The reaction mixture was stirred at 25° C. for 3 h. The resulting reaction mixture was partitioned between water (75 mL) and ethyl acetate (75 mL) and then treated with a 1N aqueous hydrochloric acid solution (10 mL). The layers were shaken and separated. The organic layer was dried over magnesium sulfate, filtered, and concentrated in vacuo to afford 2-(3,4-bis-methanesulfonyl-phenyl)-3-cyclopentyl-propionic acid (1.10 g, 98%) as a white foam which was used without further purification: mp 64-68° C. (foam to gel); FAB-HRMS m/e calcd for C16H22O6S2 (M+H)+ 375.0936, found 375.0932.

Workup

customThe resulting reaction mixture
customwas partitioned between water (75 mL) and ethyl acetate (75 mL)
additiontreated with a 1N aqueous hydrochloric acid solution (10 mL)
stirringThe layers were shaken
customseparated
dry with materialThe organic layer was dried over magnesium sulfate
filtrationfiltered
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-d298a1599ac6460ebdd1c4f6d0f485e6
Source dataset: uspto-grants-2001_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06320050B1

Reaction notes

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