N,N,N',N'-Tetramethylethylenediamine → (3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-1-(pyrazin-2-yl)piperidin-2-one

HRID 932017Notes

Reaction equation

HRID 932017 reaction equation
[CH2:1]([C@@:4]1([CH3:25])[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)[NH:6][C:5]1=[O:24])[CH:2]=[CH2:3].I[C:27]1[CH:32]=[N:31][CH:30]=[CH:29][N:28]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CN(CCN(C)C)C>O1CCOCC1.[Cu]I>[CH2:1]([C@@:4]1([CH3:25])[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:27]2[CH:32]=[N:31][CH:30]=[CH:29][N:28]=2)[C:5]1=[O:24])[CH:2]=[CH2:3]

Participants

7

Reactant 4

HCID 8037N,N,N',N'-TetramethylethylenediamineHCID 10796Cesium carbonateHCID 642841IodopyrazineHCID 58574008(3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methylpiperidin-2-one

Product 1

HCID 67999846(3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-1-(pyrazin-2-yl)piperidin-2-one

Reagents, catalysts & solvents 2

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
110 °C

Procedure

(3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methylpiperidin-2-one (Example 71, Step D) (100 mg, 0.27 mmol), 2-iodopyrazine (170 μL, 0.80 mmol) and cesium carbonate (220 mg, 0.67 mmol) were dissolved in 2.7 mL of 1,4-dioxane. The reaction vessel was flushed with argon, copper (I) iodide (5.1 mg, 27 μmol) and TMEDA (11 μL, 80 μmol) were added, and the reaction mixture was allowed to stir at 110° C. for 15 hours. The reaction mixture was cooled to room temperature, quenched with water and extracted (2×EtOAc). The combined organic layers were washed with sat. aq. NaCl solution, dried over Na2SO4, filtered and the filtrate was concentrated under reduced pressure. Purification of the residue by flash chromatography on silica gel (0 to 50% EtOAc/hexanes) provided the title compound as a colorless solid.

Workup

  1. additionwere added
  2. temperatureThe reaction mixture was cooled to room temperature
  3. customquenched with water
  4. extractionextracted (2×EtOAc)
  5. washThe combined organic layers were washed with sat. aq. NaCl solution
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationthe filtrate was concentrated under reduced pressure
  9. customPurification of the residue by flash chromatography on silica gel (0 to 50% EtOAc/hexanes)

Sources & evidence

ORD record
ord-016c8e60377c46fe93f76b5da4fc8baf
Source dataset
uspto-grants-2016_03
Patent number
US09296736B2

Reaction notes

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