Potassium Phosphate, Tribasic → 4-[4-Amino-3-(4,4-dimethyl-cyclohex-1-enyl)-phenyl]-piperidine-2,6-dione

HRID 2219607Notes

Reaction equation

HRID 2219607 reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[CH2:13][C:12](=[O:14])[NH:11][C:10](=[O:15])[CH2:9]2)=[CH:4][C:3]=1Br.[O-]P([O-])([O-])=O.[K+].[K+].[K+].[CH3:25][C:26]1([CH3:35])[CH2:31][CH2:30][C:29](B(O)O)=[CH:28][CH2:27]1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C=CC=CC=2)CCCCC1>C1(C)C=CC=CC=1.O1CCOCC1.CCOC(C)=O.CC([O-])=O.CC([O-])=O.[Pd+2]>[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[CH2:13][C:12](=[O:14])[NH:11][C:10](=[O:15])[CH2:9]2)=[CH:4][C:3]=1[C:29]1[CH2:30][CH2:31][C:26]([CH3:35])([CH3:25])[CH2:27][CH:28]=1

Participants

9

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 27342162-(Dicyclohexylphosphino)biphenylHCID 441195554,4-Dimethylcyclohexen-1-ylboronic acidHCID 597712744-(4-Amino-3-bromo-phenyl)-piperidine-2,6-dione

Product 1

HCID 597712924-[4-Amino-3-(4,4-dimethyl-cyclohex-1-enyl)-phenyl]-piperidine-2,6-dioneYield 21.1%

Reagents, catalysts & solvents 4

HCID 167845palladium(II) acetateCatalystHCID 1140TolueneSolventHCID 8857Ethyl AcetateSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
80 °C

Procedure

A solution of 600 mg (2.12 mmol) of 4-(4-amino-3-bromo-phenyl)-piperidine-2,6-dione (as prepared in Example 1, step (j)) in toluene (20 mL) and dioxane (20 mL) was treated with 900 mg (4.24 mmol) of K3PO4, 424 mg (2.76 mmol) of 4,4-dimethyl-cyclohex-1-enylboronic acid, and 297 mg (0.848 mmol) of 2-(dicyclohexylphosphino)biphenyl. The mixture was degassed via sonication, placed under Ar, treated with 47.6 mg (0.212 mmol) of Pd(OAc)2, and heated to 80° C. for 2.5 h. The mixture was diluted with EtOAc (100 mL) and washed with water (2×70 mL). The aqueous layer was extracted with EtOAc (100 mL), the combined organic layers were dried (MgSO4) and concentrated in vacuo. Silica gel chromatography of the residue on a 50-g Varian MegaBond Elut SPE column with 25-50% EtOAc-hexane afforded 140 mg (21%) of the title compound as a tan solid: Mass spectrum (ESI, m/z): Calcd. for C19H24N2O2, 313.2 (M+H). found 313.1.

Workup

  1. customThe mixture was degassed via sonication
  2. washwashed with water (2×70 mL)
  3. extractionThe aqueous layer was extracted with EtOAc (100 mL)
  4. dry with materialthe combined organic layers were dried (MgSO4)
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-449f267fa3674e57a945b3a98d75d173
Source dataset
uspto-grants-2008_08
Patent number
US07414050B2

Reaction notes

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