Sodium hydride → {4-[(R)-2-Oxo-6-((E)-3-oxo-4-phenyl-but-1-enyl)-piperidin-1-yl]-butoxy}-acetic acid methyl ester

HRID 489150Notes

Reaction equation

HRID 489150 reaction equation
[H-].[Na+].[O:3]=[C:4]([CH2:12][C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1)[CH2:5]P(=O)(OC)OC.[CH3:19][O:20][C:21](=[O:37])[CH2:22][O:23][CH2:24][CH2:25][CH2:26][CH2:27][N:28]1[C:33](=[O:34])[CH2:32][CH2:31][CH2:30][C@@H:29]1[CH:35]=O>C1COCC1>[CH3:19][O:20][C:21](=[O:37])[CH2:22][O:23][CH2:24][CH2:25][CH2:26][CH2:27][N:28]1[C@@H:29](/[CH:35]=[CH:5]/[C:4](=[O:3])[CH2:12][C:13]2[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=2)[CH2:30][CH2:31][CH2:32][C:33]1=[O:34]

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 12805884Dimethyl-2-oxo-3-phenylpropyl phosphonateHCID 86595297[4-((R)-2-formyl-6-oxo-piperidin-1-yl)-butoxy]-acetic acid methyl ester

Product 1

HCID 11349716{4-[(R)-2-Oxo-6-((E)-3-oxo-4-phenyl-but-1-enyl)-piperidin-1-yl]-butoxy}-acetic acid methyl esterYield 31.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

Sodium hydride (60% dispersion in oil, 14 mg, 0.35 mmol) was added to a solution of dimethyl 2-oxo-3-phenylpropylphosphonate (83 mg, 0.34 mmol) in THF (1.0 mL) at 0° C. After 1 h at 0° C., [4-((R)-2-formyl-6-oxo-piperidin-1-yl)-butoxy]-acetic acid methyl ester (94 mg, 0.35 mmol) in THF (1 mL) was added via cannula. The reaction was allowed to warm to rt. After 22 h at rt, the reaction was quenched with saturated aqueous NH4Cl (10 mL) and extracted with EtOAc (3×15 mL). The combined organic phase was washed with brine (20 mL), dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (30%→50% EtOAc/CH2Cl2, gradient) afforded 42 mg (31%) of the title compound.

Workup

  1. waitAfter 22 h at rt
  2. customthe reaction was quenched with saturated aqueous NH4Cl (10 mL)
  3. extractionextracted with EtOAc (3×15 mL)
  4. washThe combined organic phase was washed with brine (20 mL)
  5. dry with materialdried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customPurification of the residue by flash column chromatography on silica gel (30%→50% EtOAc/CH2Cl2, gradient)

Sources & evidence

ORD record
ord-5b52238e8dac44b380020d14e8ad3d3a
Source dataset
uspto-grants-2005_12
Patent number
US06977260B2

Reaction notes

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