Sodium hydride → 7-[(R)-2-oxo-6-((E)-3-oxo-4-phenyl-but-1-enyl)-piperidin-1-yl]-hept-5-enoic acid methyl ester

HRID 2052927Notes

Reaction equation

HRID 2052927 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][CH2:23][CH2:24][CH:25]=[CH: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][CH2:23][CH2:24][CH:25]=[CH: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 865952967-((R)-2-formyl-6-oxo-piperidin-1-yl)-hept-5-enoic acid methyl ester

Product 1

HCID 690213997-[(R)-2-oxo-6-((E)-3-oxo-4-phenyl-but-1-enyl)-piperidin-1-yl]-hept-5-enoic acid methyl esterYield 45%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

Sodium hydride (60% dispersion in oil, 2.5 mg, 0.063 mmol) was added to a solution of dimethyl 2-oxo-3-phenylpropylphosphonate (14 mg, 0.058 mmol) in THF (0.3 mL) at 0° C. After 1 h at 0° C. rt, 7-((R)-2-formyl-6-oxo-piperidin-1-yl)-hept-5-enoic acid methyl ester (crude from previous reaction, ˜0.062 mmol) in THF (0.7 mL) was added via cannula. The reaction was allowed to warm to rt. After 18 h at rt, the reaction was quenched with acetic acid (50% aqueous, 5 mL) and extracted with EtOAc (3×5 mL). The combined organic phase was washed brine (10 mL), dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→25% EtOAc/CH2Cl2, gradient) afforded 10 mg (42%) of 7-[(R)-2-oxo-6-((E)-3-oxo-4-phenyl-but-1-enyl)-piperidin-1-yl]-hept-5-enoic acid methyl ester.

Workup

  1. customthe reaction was quenched with acetic acid (50% aqueous, 5 mL)
  2. extractionextracted with EtOAc (3×5 mL)
  3. washThe combined organic phase was washed brine (10 mL)
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customPurification of the residue by flash column chromatography on silica gel (CH2Cl2→25% EtOAc/CH2Cl2, gradient)

Sources & evidence

ORD record
ord-57de170ceeba4531aa2e2768349b48ee
Source dataset
uspto-grants-2008_02
Patent number
US07326716B2

Reaction notes

Loading…