Potassium Carbonate → HCID 19786575, compound

HRID 1646738Notes

Reaction equation

HRID 1646738 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.[N:37]1([C:43]2[C:47]3[CH:48]=[CH:49][CH:50]=[CH:51][C:46]=3[S:45][N:44]=2)[CH2:42][CH2:41][NH:40][CH2:39][CH2:38]1>[I-].[K+].CN(C=O)C>[S:45]1[C:46]2[CH:51]=[CH:50][CH:49]=[CH:48][C:47]=2[C:43]([N:37]2[CH2:38][CH2:39][N:40]([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)[CH2:41][CH2:42]2)=[N:44]1

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 81531DiisopropylethylamineHCID 27721443-(1-Piperazinyl)-1,2-benzisothiazoleHCID 19786560HCID 19786560, compound

Product 1

HCID 19786575HCID 19786575, compoundYield 46.1%

Reagents, catalysts & solvents 2

HCID 4875Potassium IodideCatalystHCID 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 (1.36 g) and DMF (40 ml) was added anhydrous potassium carbonate (0.3 g), diisopropylethyl amine (0.8 ml), 3-piperazinyl-1,2-benzisothiazol (1.26 g) and potassium iodide (27 mg) at room temperature with stirring. The flask was flushed with nitrogen and warmed to 80° C. for 12 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 three times with ethyl acetate. The combined organic layers were washed with brine and dried (MgSO4). Filtration and concentration gave the crude product. Purification via flash column chromatography (silica gel, 20% triethylamine/ether) afforded 1.0 g of 5-[3-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]propyl]-3-(2-fluorophenyl)-6,7-dihydro-1,2-benzisoxazol-4(5H)-one as a foam. The product was flushed through alumina with dichloromethane. The hydrochloride was prepared by dissolving the free amine with menthanol and adding ethereal HCl. The salt was filtered and washed with pentane, m.p. 215° C. (dec.).

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 three times with ethyl acetate
  6. washThe combined organic layers were washed with brine
  7. dry with materialdried (MgSO4)
  8. filtrationFiltration and concentration
  9. customgave the crude product
  10. customPurification via flash column chromatography (silica gel, 20% triethylamine/ether)

Sources & evidence

ORD record
ord-c0c49a603daa49e4b0c2cd3fcea692d3
Source dataset
uspto-grants-1993_01
Patent number
US05180834

Reaction notes

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