Lithium hydroxide, monohydrate → (S)-2-[4-(3-cyclopropyl-2-fluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid

HRID 19168

Reaction equation

HRID 19168 reaction equation
C([O:3][C:4](=[O:27])[C@@H:5]([N:10]1[CH2:14][C:13]([O:15][C:16]2[CH:21]=[CH:20][CH:19]=[C:18]([CH:22]3[CH2:24][CH2:23]3)[C:17]=2[F:25])=[CH:12][C:11]1=[O:26])[CH2:6][CH:7]([CH3:9])[CH3:8])C.O.[OH-].[Li+]>O1CCCC1>[CH:22]1([C:18]2[C:17]([F:25])=[C:16]([CH:21]=[CH:20][CH:19]=2)[O:15][C:13]2[CH2:14][N:10]([C@@H:5]([CH2:6][CH:7]([CH3:9])[CH3:8])[C:4]([OH:27])=[O:3])[C:11](=[O:26])[CH:12]=2)[CH2:23][CH2:24]1

Participants

4

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 66895408(S)-2-[4-(3-cyclopropyl-2-fluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid ethyl ester

Product 1

HCID 66894750(S)-2-[4-(3-cyclopropyl-2-fluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acidYield 102.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution containing (S)-2-[4-(3-cyclopropyl-2-fluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid ethyl ester (0.800 g, 0.002 mol) in tetrahydrofuran (30 mL) was treated with an aqueous solution of lithium hydroxide monohydrate (0.5N, 15 mL, 0.008 mol). The mixture was stirred at room temperature for 1 h, and the solvents evaporated. The residue was dissolved in water and washed with diethyl ether, and the diethyl ether layer discarded. The aqueous phase was acidified with dilute hydrochloric acid (pH <2), and extracted with ethyl acetate. The combined organic layers were dried over sodium sulfate and concentrated to afford (S)-2-[4-(3-cyclopropyl-2-fluoro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid (0.71 g, 96%) as a yellow solid.

Workup

  1. customthe solvents evaporated
  2. dissolutionThe residue was dissolved in water
  3. washwashed with diethyl ether
  4. extractionextracted with ethyl acetate
  5. dry with materialThe combined organic layers were dried over sodium sulfate
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-d267419f2f8c441f99fb58fbcbd1ba5f
Source dataset
uspto-grants-2010_06
Patent number
US07741327B2

Linked notes

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