(S)-2-((3S,5R,6S)-3-Allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxopiperidin-1-yl)butanal → (3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((3S)-2-hydroxypentan-3-yl)-3-methylpiperidin-2-one

HRID 1048415Notes

Reaction equation

HRID 1048415 reaction equation
[CH2:1]([C@@:4]1([CH3:30])[CH2:9][C@H:8]([C:10]2[CH:15]=[CH:14][CH:13]=[C:12]([Cl:16])[CH:11]=2)[C@@H:7]([C:17]2[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][CH:18]=2)[N:6]([C@@H:24]([CH2:27][CH3:28])[CH:25]=[O:26])[C:5]1=[O:29])[CH:2]=[CH2:3].[CH3:31][Mg]Br>C1COCC1.C1(C)C=CC=CC=1.O1CCCC1>[CH2:1]([C@@:4]1([CH3:30])[CH2:9][C@H:8]([C:10]2[CH:15]=[CH:14][CH:13]=[C:12]([Cl:16])[CH:11]=2)[C@@H:7]([C:17]2[CH:18]=[CH:19][C:20]([Cl:23])=[CH:21][CH:22]=2)[N:6]([C@@H:24]([CH2:27][CH3:28])[CH:25]([OH:26])[CH3:31])[C:5]1=[O:29])[CH:2]=[CH2:3]

Participants

5

Reactant 2

HCID 58573909(S)-2-((3S,5R,6S)-3-Allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxopiperidin-1-yl)butanalHCID 178418573HCID 178418573, compound

Product 1

HCID 58573239(3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((3S)-2-hydroxypentan-3-yl)-3-methylpiperidin-2-one

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 22635083Tetrahydrofuran tolueneSolvent

Procedure

To a 0° C. solution of 399 g (899 mmol) of (S)-2-((3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxopiperidin-1-yl)butanal (Example 151, Step B) in THF (9 L) was added 1.93 L (2.70 mol) of a 1.4 M solution of methylmagnesium bromide 75:25 in toluene/tetrahydrofuran slowly over a 30 min period so as to maintain an internal reaction temperature below 6° C. The yellow solution was warmed to room temperature and stirred for 1.5 h. At this time the reaction was cooled to 0° C. and quenched by cautious, slow addition of saturated aqueous ammonium chloride (4.6 L) so as to maintain an internal reaction temperature below 15° C. The mixture was warmed to room temperature, ethyl acetate was added, and the layers were separated. The aqueous layer was extracted with EtOAc (2×). The combined organic layers were washed with water (1×) and then saturated aqueous sodium chloride (1×), dried over Na2SO4, filtered and the filtrate was concentrated to afford a yellow oil. Purification of the residue by chromatography on silica (Biotage® Snap™ column; Biotage, LLC, Charlotte, N.C.), 5% acetone/5% EtOAc/90% hexanes grading to 5% acetone/29% EtOAc/66% hexanes) provided the title compound as a white solid.

Workup

  1. temperatureto maintain an internal reaction temperature below 6° C
  2. temperatureAt this time the reaction was cooled to 0° C.
  3. customquenched by cautious,
  4. additionslow addition of saturated aqueous ammonium chloride (4.6 L) so as
  5. temperatureto maintain an internal reaction temperature below 15° C
  6. temperatureThe mixture was warmed to room temperature
  7. additionethyl acetate was added
  8. customthe layers were separated
  9. extractionThe aqueous layer was extracted with EtOAc (2×)
  10. washThe combined organic layers were washed with water (1×)
  11. dry with materialsaturated aqueous sodium chloride (1×), dried over Na2SO4
  12. filtrationfiltered
  13. concentrationthe filtrate was concentrated
  14. customto afford a yellow oil
  15. customPurification of the residue by chromatography on silica (Biotage® Snap™ column; Biotage, LLC, Charlotte, N.C.), 5% acetone/5% EtOAc/90% hexanes grading to 5% acetone/29% EtOAc/66% hexanes)

Sources & evidence

ORD record
ord-c462c57d5481491e89d3410347ecae73
Source dataset
uspto-grants-2013_10
Patent number
US08569341B2

Reaction notes

Loading…