Potassium Phosphate, Tribasic → 2-(3,9-dimethyl-2,3,4,5-tetrahydroazepino[4,5-b]indol-6(1H)-yl)-1-(piperidin-1-yl)ethanone

HRID 1481427Notes

Reaction equation

HRID 1481427 reaction equation
[CH3:1][N:2]1[CH2:15][CH2:14][C:13]2[C:12]3[CH:11]=[C:10]([CH3:16])[CH:9]=[CH:8][C:7]=3[NH:6][C:5]=2[CH2:4][CH2:3]1.N1CCC[C@H]1C(O)=O.[O-]P([O-])([O-])=O.[K+].[K+].[K+].Cl[CH2:34][C:35]([N:37]1[CH2:42][CH2:41][CH2:40][CH2:39][CH2:38]1)=[O:36]>[Cu]I.CN(C=O)C>[CH3:1][N:2]1[CH2:15][CH2:14][C:13]2[C:12]3[CH:11]=[C:10]([CH3:16])[CH:9]=[CH:8][C:7]=3[N:6]([CH2:34][C:35]([N:37]3[CH2:42][CH2:41][CH2:40][CH2:39][CH2:38]3)=[O:36])[C:5]=2[CH2:4][CH2:3]1

Participants

7

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 145742L-ProlineHCID 2223122-Chloro-1-piperidine-1-yl-ethanoneHCID 685600921,2,3,4,5,6-Hexahydro-3,9-dimethylazepino[4,5-b]indole

Product 1

HCID 593682812-(3,9-dimethyl-2,3,4,5-tetrahydroazepino[4,5-b]indol-6(1H)-yl)-1-(piperidin-1-yl)ethanoneYield 8.8%

Reagents, catalysts & solvents 2

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 6228DimethylformamideSolvent

Procedure

The title compound was prepared by following general procedure 7. 3,9-Dimethyl-1,2,3,4,5,6-hexahydroazepino[4,5-b]indole (100 mg, 0.47 mmol), was taken into DMF. CuI (9 mg, 0.046 mmol), L-proline (11 mg, 0.093 mmol), K3PO4 (198 mg, 0.93 mmol) were added to the solution and stirred for 10 min. at RT. 2-Chloro-1-(piperidin-1-yl)ethanone (91 mg, 0.56 mmol) was added dropwise. The reaction mixture was heated at 90° C. for 12 h. After completion of reaction, the reaction mixture was filtered through Celite. DMF was evaporated under reduced pressure and then extracted with ethyl acetate. The organic layer was dried over Na2SO4, and concentrated under reduced pressure to obtain 14 mg of 2-(3,9-dimethyl-2,3,4,5-tetrahydroazepino[4,5-b]indol-6(1H)-yl)-1-(piperidin-1-yl)ethanone as the TFA salt after purification by reverse-phase chromatography (C-18, 500 mm×50 mm, Mobile Phase A=0.05% TFA in water, B=0.05% TFA in acetonitrile, Gradient: 10% B to 80% B in 30 min., injection vol. 5 mL).

Workup

  1. customThe title compound was prepared
  2. temperatureThe reaction mixture was heated at 90° C. for 12 h
  3. customAfter completion of reaction
  4. filtrationthe reaction mixture was filtered through Celite
  5. customDMF was evaporated under reduced pressure
  6. extractionextracted with ethyl acetate
  7. dry with materialThe organic layer was dried over Na2SO4
  8. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-223278eb044143d7890d866116eb4e49
Source dataset
uspto-grants-2016_08
Patent number
US09409910B2

Reaction notes

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