2-Aminocyclohexanol → HCID 18317736, compound

HRID 1700429Notes

Reaction equation

HRID 1700429 reaction equation
[C:1]1([CH:7]2[CH2:12][C:11](=O)[CH2:10][C:9](=[O:14])[CH2:8]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[NH2:15][CH:16]1[CH2:21][CH2:20][CH2:19][CH2:18][CH:17]1O>O1CCCC1>[C:1]1([CH:7]2[CH2:8][C:9](=[O:14])[C:10]3[C:17]4[CH2:18][CH2:19][CH2:20][CH2:21][C:16]=4[NH:15][C:11]=3[CH2:12]2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

4

Reactant 2

HCID 232862-AminocyclohexanolHCID 5689621,3-Cyclohexanedione, 5-phenyl-

Product 1

HCID 18317736HCID 18317736, compoundYield 60.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
150 °C

Procedure

A mixture of 5-phenylcyclohexane-1,3-dione (4.0 g), 2-aminocyclohexanol (3.2 g), molecular sieves 4A (24 g) and tetrahydrofuran (60 ml) was refluxed for 12 hours and cooled, and insoluble materials were filtered off. Under reduced pressure, the solvent was evaporated, and the residue was dissolved in dimethylformamide (100 ml). To the solution were added 2-bromomesitylene (4.2 g), tetrakistriphenylphosphine palladium (0.6 g) and potassium carbonate (5.9 g), and the mixture was stirred at 150° C. for 4 hours and concentrated under reduced pressure. The residue was dissolved in ethyl acetate, and the solution was washed with sodium hydrogen carbonate solution, water and saturated brine, dried with magnesium sulfate and concentrated under reduced pressure. The residue was purified with silica gel column chromatography (EtOAc), and the resulting crystals were recrystallized from ethyl acetate-hexane to give colorless crystals of 2-phenyl-1,2,3,4,5,6,7,8-octahydrocarbazol-4-one (3.4 g).

Workup

  1. temperaturewas refluxed for 12 hours
  2. temperaturecooled
  3. filtrationinsoluble materials were filtered off
  4. customUnder reduced pressure, the solvent was evaporated
  5. dissolutionthe residue was dissolved in dimethylformamide (100 ml)
  6. additionTo the solution were added 2-bromomesitylene (4.2 g), tetrakistriphenylphosphine palladium (0.6 g) and potassium carbonate (5.9 g)
  7. concentrationconcentrated under reduced pressure
  8. dissolutionThe residue was dissolved in ethyl acetate
  9. washthe solution was washed with sodium hydrogen carbonate solution, water and saturated brine
  10. dry with materialdried with magnesium sulfate
  11. concentrationconcentrated under reduced pressure
  12. customThe residue was purified with silica gel column chromatography (EtOAc)
  13. customthe resulting crystals were recrystallized from ethyl acetate-hexane

Sources & evidence

ORD record
ord-ebb331f05916409db7c7ee4c2731d3a0
Source dataset
uspto-grants-2002_02
Patent number
US06350749B1

Reaction notes

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