Lithium hydroxide, monohydrate → HCID 23627747, compound

HRID 1171911Notes

Reaction equation

HRID 1171911 reaction equation
C[O:2][C:3](=[O:32])[CH2:4][N:5]1[CH2:10][CH2:9][N:8]([C:11]2[CH:16]=[CH:15][C:14]([O:17][CH3:18])=[C:13]([O:19][CH:20]3[CH2:24][CH2:23][CH2:22][CH2:21]3)[CH:12]=2)[CH2:7][C@@H:6]1[CH2:25][C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1.O.[OH-].[Li+]>C1COCC1>[CH2:25]([C@H:6]1[CH2:7][N:8]([C:11]2[CH:16]=[CH:15][C:14]([O:17][CH3:18])=[C:13]([O:19][CH:20]3[CH2:24][CH2:23][CH2:22][CH2:21]3)[CH:12]=2)[CH2:9][CH2:10][N:5]1[CH2:4][C:3]([OH:32])=[O:2])[C:26]1[CH:27]=[CH:28][CH:29]=[CH:30][CH:31]=1

Participants

4

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 23627745HCID 23627745, compound

Product 1

HCID 23627747HCID 23627747, compoundYield 96%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of [(S)-2-Benzyl-4-(3-cyclopentyloxy-4-methoxy-phenyl)-piperazin-1-yl]-acetic acid methyl ester (Example 57) (342 mg, 0.78 mmol) in THF (5 mL) at room temperature was treated with an aqueous solution (1 mL) containing lithium hydroxide monohydrate (36 mg, 0.858 mmol). The reaction mixture was allowed to stir for 2 h and then evaporated to a small volume. The reaction mixture was then dissolved in water (5 mL) and the pH adjusted to ˜7 with 1 N HCl to precipitate product. The precipitate was then triturated with water (2×5 mL) and dried under a stream of nitrogen to afford product as a colorless solid (318 mg, 96%). 1H NMR (CDCl3) 1.43-1.57 (m, 2H), 1.77-1.79 (m, 6H), 3.02-3.15 (m, 2H), 3.27 (br s, 2H), 3.51 (br s, 1H), 3.74 (s, 3H), 3.77-3.89 (m, 2H), 4.57-4.59 (m, 1H), 6.24-6.31 (m, 2H), 6.55 (br s, OH), 6.67 (d, J=8.6, 1H) 7.18-7.27 (m, 5H). LC/MS 5.34 min, [M+1]+ 425.

Workup

  1. customevaporated to a small volume
  2. dissolutionThe reaction mixture was then dissolved in water (5 mL)
  3. customto precipitate product
  4. customThe precipitate was then triturated with water (2×5 mL)
  5. customdried under a stream of nitrogen

Sources & evidence

ORD record
ord-48af4f61ec3d40abbdacd9f44018a351
Source dataset
uspto-grants-2010_11
Patent number
US07829713B2

Reaction notes

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