Acetic Acid → (5R,6S)-5-(3-chlorophenyl)-6-(5-chloropyridin-2-yl)-1-(2,4-dimethoxybenzyl)piperidin-2-one

HRID 1048369Notes

Reaction equation

HRID 1048369 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C@H:8]2[C@H:13]([C:14]3[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][N:15]=3)[NH:12][C:11](=[O:21])[CH2:10][CH2:9]2)[CH:5]=[CH:6][CH:7]=1.[H-].[Na+].Cl[CH2:25][C:26]1[CH:31]=[CH:30][C:29]([O:32][CH3:33])=[CH:28][C:27]=1[O:34][CH3:35].C(O)(=O)C.C([O-])(O)=O.[Na+]>CN(C=O)C>[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:8]2[C@@H:13]([C:14]3[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][N:15]=3)[N:12]([CH2:25][C:26]3[CH:31]=[CH:30][C:29]([O:32][CH3:33])=[CH:28][C:27]=3[O:34][CH3:35])[C:11](=[O:21])[CH2:10][CH2:9]2)[CH:5]=[CH:6][CH:7]=1

Participants

7

Reactant 5

HCID 176Acetic AcidHCID 24758Sodium hydrideHCID 516892Sodium BicarbonateHCID 185052611-(Chloromethyl)-2,4-dimethoxybenzeneHCID 86660724trans 5-(3-Chlorophenyl)-6-(5-chloropyridin-2-yl)piperidin-2-one

Product 1

HCID 58573798(5R,6S)-5-(3-chlorophenyl)-6-(5-chloropyridin-2-yl)-1-(2,4-dimethoxybenzyl)piperidin-2-one

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 6.72 g (20.92 mmol) of (5R,6S)-5-(3-chlorophenyl)-6-(5-chloropyridin-2-yl)piperidin-2-one (Example 121, Step F) in DMF (˜0.5M) at 0° C. was slowly added a dispersion of 60% sodium hydride in mineral oil (2.51 g, 62.8 mmol). The reaction was stirred 0° C. for 30 min, followed by addition of 1-(chloromethyl)-2,4-dimethoxybenzene (7.81 g, 41.8 mmol). Upon completion, the reaction was quenched at 0° C. with a small excess of acetic acid (4.79 mL, 84 mmol). It was neutralized with sat. aq. NaHCO3 solution and extracted with ethyl acetate. The organic layer was dried over Na2SO4, filtered and the filtrate as concentrated under reduced pressure to yield a reddish oil. Purification by flash chromatography on silica gel (eluent: 0 to 30% ethyl acetate/DCM, gradient elution) provided the title compound as a pale yellow oil.

Workup

  1. extractionextracted with ethyl acetate
  2. dry with materialThe organic layer was dried over Na2SO4
  3. filtrationfiltered
  4. concentrationthe filtrate as concentrated under reduced pressure
  5. customto yield a reddish oil
  6. customPurification by flash chromatography on silica gel (eluent: 0 to 30% ethyl acetate/DCM, gradient elution)

Sources & evidence

ORD record
ord-55abef976d1b4ab687bb7595901f5eef
Source dataset
uspto-grants-2013_10
Patent number
US08569341B2

Reaction notes

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