1-(3-Chlorophenyl)piperazine → HCID 19801310, compound

HRID 1646741Notes

Reaction equation

HRID 1646741 reaction equation
Cl[CH2:2][CH2:3][CH2:4][CH:5]1[C:20](=[O:21])[C:9]2[C:10]([C:13]3[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=3[F:19])=[N:11][O:12][C:8]=2[CH2:7][CH2:6]1.C(=O)([O-])[O-].[K+].[K+].C(N(C(C)C)CC)(C)C.[Cl:37][C:38]1[CH:39]=[C:40]([N:44]2[CH2:49][CH2:48][NH:47][CH2:46][CH2:45]2)[CH:41]=[CH:42][CH:43]=1.[I-].[K+]>CN(C=O)C>[Cl:37][C:38]1[CH:39]=[C:40]([N:44]2[CH2:49][CH2:48][N:47]([CH2:2][CH2:3][CH2:4][CH:5]3[C:20](=[O:21])[C:9]4[C:10]([C:13]5[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=5[F:19])=[N:11][O:12][C:8]=4[CH2:7][CH2:6]3)[CH2:46][CH2:45]2)[CH:41]=[CH:42][CH:43]=1

Participants

7

Reactant 5

HCID 13551-(3-Chlorophenyl)piperazineHCID 4875Potassium IodideHCID 11430Potassium CarbonateHCID 81531DiisopropylethylamineHCID 19786560HCID 19786560, compound

Product 1

HCID 19801310HCID 19801310, compoundYield 37.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
80 °C

Procedure

To a solution consisting of 5-(3-chloropropyl)-3-(2-fluorophenyl)-6,7-dihydro-1,2-benzisoxazol-4(5H)-one (6.0 g) and DMF (100 ml) was added anhydrous potassium carbonate (1.4 g), diisopropylethylamine (5.1 ml), 1-(3-chlorophenyl) piperazine (4.9 g) and potassium iodide (0.3 g) at room temperature with stirring. The flask was flushed with nitrogen and warmed to 80° C. for 18 hours. Upon cooling to room temperature, water and ethyl acetate were added to the reaction mixture. The layers were separated and the aqueous phase was extracted 3 times with ethyl acetate. The combined organic layers were washed with water twice, then brine twice, and dried (MgSO4). Filtration and concentration gave the crude product. Purification via flash column chromatography (silica gel) afforded 3.4 g of 5-[3-(4-(3-chlorophenyl)-1-piperazinyl)-propyl]-6,7-dihydro-3-(2-fluorophenyl)-1,2-benzisoxazol-4(5H)-one as an oil. The hydrochloride was prepared in methanol with ethereal HCl. The precipitate was filtered and washed with anhydrous ether, m.p. 104°-106° C.

Workup

  1. customThe flask was flushed with nitrogen
  2. temperatureUpon cooling to room temperature
  3. additionwater and ethyl acetate were added to the reaction mixture
  4. customThe layers were separated
  5. extractionthe aqueous phase was extracted 3 times with ethyl acetate
  6. washThe combined organic layers were washed with water twice
  7. dry with materialbrine twice, and dried (MgSO4)
  8. filtrationFiltration and concentration
  9. customgave the crude product
  10. customPurification via flash column chromatography (silica gel)

Sources & evidence

ORD record
ord-c53cfe9e4a8648fb87210a045b283842
Source dataset
uspto-grants-1993_01
Patent number
US05180834

Reaction notes

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