Lithium hydroxide, monohydrate → (S)-2-{4-[4-(2-hydroxy-2-methyl-propyl)-phenoxy]-2-oxo-2,5-dihydro-pyrrol-1-yl}-4-methyl-pentanoic acid

HRID 19382Notes

Reaction equation

HRID 19382 reaction equation
C[O:2][C:3](=[O:27])[C@@H:4]([N:9]1[CH2:13][C:12]([O:14][C:15]2[CH:20]=[CH:19][C:18]([CH2:21][C:22]([OH:25])([CH3:24])[CH3:23])=[CH:17][CH:16]=2)=[CH:11][C:10]1=[O:26])[CH2:5][CH:6]([CH3:8])[CH3:7].O.[OH-].[Li+]>O1CCCC1.O>[OH:25][C:22]([CH3:24])([CH3:23])[CH2:21][C:18]1[CH:17]=[CH:16][C:15]([O:14][C:12]2[CH2:13][N:9]([C@@H:4]([CH2:5][CH:6]([CH3:7])[CH3:8])[C:3]([OH:27])=[O:2])[C:10](=[O:26])[CH:11]=2)=[CH:20][CH:19]=1

Participants

5

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 66895035HCID 66895035, compound

Product 1

HCID 66895044(S)-2-{4-[4-(2-hydroxy-2-methyl-propyl)-phenoxy]-2-oxo-2,5-dihydro-pyrrol-1-yl}-4-methyl-pentanoic acidYield 83%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

A solution of (S)-2-{4-[4-(2-hydroxy-2-methyl-propyl)-phenoxy]-2-oxo-2,5-dihydro-pyrrol-1-yl}-4-methyl-pentanoic acid methyl ester (0.150 g, 0.40 mmol) in tetrahydrofuran (5 mL) and water (1 mL) was treated with lithium hydroxide monohydrate (0.017 g 0.40 mmol). The mixture was stirred at room temperature for 1.75 h and then partitioned between ethyl acetate and water. The water layer was made acidic with 1N aqueous hydrochloric acid (pH=1) and extracted with ethyl acetate. The combined organic layers were dried over sodium sulfate, filtered and concentrated in vacuo to afford (S)-2-{4-[4-(2-hydroxy-2-methyl-propyl)-phenoxy]-2-oxo-2,5-dihydro-pyrrol-1-yl}-4-methyl-pentanoic acid (0.120 g, 83%) as a white solid.

Workup

  1. custompartitioned between ethyl acetate and water
  2. extractionextracted with ethyl acetate
  3. dry with materialThe combined organic layers were dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-a1c989e098ee47898365bdf080662094
Source dataset
uspto-grants-2010_06
Patent number
US07741327B2

Reaction notes

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