Tetrabutylammonium Fluoride → 4-{3-[2-(3-Hydroxy-4-phenyl-butyl)-5-oxo-pyrrolidin-1-yl]-propyl}-benzoic acid methyl ester

HRID 352576Notes

Reaction equation

HRID 352576 reaction equation
[CH3:1][O:2][C:3](=[O:37])[C:4]1[CH:9]=[CH:8][C:7]([CH2:10][CH2:11][CH2:12][N:13]2[C:17](=[O:18])[CH2:16][CH2:15][CH:14]2[CH2:19][CH2:20][CH:21]([O:29][Si](C(C)(C)C)(C)C)[CH2:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)=[CH:6][CH:5]=1.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>C1COCC1>[CH3:1][O:2][C:3](=[O:37])[C:4]1[CH:5]=[CH:6][C:7]([CH2:10][CH2:11][CH2:12][N:13]2[C:17](=[O:18])[CH2:16][CH2:15][CH:14]2[CH2:19][CH2:20][CH:21]([OH:29])[CH2:22][C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)=[CH:8][CH:9]=1

Participants

4

Reactant 2

HCID 2724141Tetrabutylammonium FluorideHCID 129700974-(3-{2-[3-(Tert-butyl-dimethyl-silanyloxy)-4-phenyl-butyl]-5-oxo-pyrrolidin-1-yl}-propyl)-benzoic acid methyl ester

Product 1

HCID 129700864-{3-[2-(3-Hydroxy-4-phenyl-butyl)-5-oxo-pyrrolidin-1-yl]-propyl}-benzoic acid methyl esterYield 86.6%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 4-(3-{2-[3-(tert-butyl-dimethyl-silanyloxy)-4-phenyl-butyl]-5-oxo-pyrrolidin-1-yl}-propyl)-benzoic acid methyl ester (3.37 g, 6.43 mmol) in THF (40 mL) at 0° C. was added tetra-butylammonium fluoride (1M in THF, 9.6 mL, 9.6 mmol). The reaction mixture was stirred at room temperature for 18 h and the volatiles were removed in vacuo. EtOAc was added and the organic solution was washed with saturated aqueous NaHCO3 (2×), water (1×), and brine (1×). The organic solution was dried (MgSO4), filtered and concentrated. The residue was purified by medium pressure chromatography eluting with EtOAc to yield 2.28 g of 4-{3-[2-(3-hydroxy-4-phenyl-butyl)-5-oxo-pyrrolidin-1-yl]-propyl}-benzoic acid methyl ester. 1H NMR (CDCl3) (selected peaks) δ7.91 (d, 2H), 7.32-7.15 (m, 7H), 3.86 (s, 3H), 3.75 (m, 1H), 3.63 (m, 1H), 3.54 (m, 1H), 2.94 (m, 1H), 2.78 (m, 1H), 2.61 (m, 3H); MS 410.1 (M+1).

Workup

  1. customthe volatiles were removed in vacuo
  2. additionEtOAc was added
  3. washthe organic solution was washed with saturated aqueous NaHCO3 (2×), water (1×), and brine (1×)
  4. dry with materialThe organic solution was dried (MgSO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified by medium pressure chromatography
  8. washeluting with EtOAc

Sources & evidence

ORD record
ord-3ac2296a00be48f785196d04c9d33830
Source dataset
uspto-grants-2004_06
Patent number
US06747054B2

Reaction notes

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