Lithium Hydroxide → (S)-3-cyclohexyl-2-[4-(2,5-dichloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-propionic acid

HRID 19238Notes

Reaction equation

C[O:2][C:3](=[O:27])[C@@H:4]([N:12]1[CH2:16][C:15]([O:17][C:18]2[CH:23]=[C:22]([Cl:24])[CH:21]=[CH:20][C:19]=2[Cl:25])=[CH:14][C:13]1=[O:26])[CH2:5][CH:6]1[CH2:11][CH2:10][CH2:9][CH2:8][CH2:7]1.[OH-].[Li+]>O1CCCC1.O>[CH:6]1([CH2:5][C@H:4]([N:12]2[CH2:16][C:15]([O:17][C:18]3[CH:23]=[C:22]([Cl:24])[CH:21]=[CH:20][C:19]=3[Cl:25])=[CH:14][C:13]2=[O:26])[C:3]([OH:27])=[O:2])[CH2:11][CH2:10][CH2:9][CH2:8][CH2:7]1

Participants

Conditions

Temperature: 23 °C

Procedure

To a stirred solution of (S)-3-cyclohexyl-2-[4-(2,5-dichloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-propionic acid methyl ester (370 mg, 0.001 mol) in tetrahydrofuran-water (3:1, 10 mL) was added lithium hydroxide (106 mg, 0.004 mol). The reaction mixture was stirred at 23° C. for 2 h. After this time, the mixture was concentrated and the reaction mixture was diluted with water. The reaction mixture was acidified with 2N hydrochloric acid, during which time precipitation occurred. The precipitate was removed by filtration, washed with cold water and dried in vacuo to obtain (S)-3-cyclohexyl-2-[4-(2,5-dichloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-propionic acid (300 mg, 84%) as a light brown solid.

Workup

concentrationAfter this time, the mixture was concentrated
additionthe reaction mixture was diluted with water
customThe reaction mixture was acidified with 2N hydrochloric acid, during which time precipitation
customThe precipitate was removed by filtration
washwashed with cold water
customdried in vacuo

Sources & evidence

ORD record: ord-c58fc64e3fab4dab8989b7ad167f1a82
Source dataset: uspto-grants-2010_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07741327B2

Reaction notes

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