Potassium Carbonate → HCID 22023228, compound

HRID 266954Notes

Reaction equation

HRID 266954 reaction equation
[F:1][C:2]1[CH:16]=[CH:15][C:5]2[C:6]([CH:9]3[CH2:14][CH2:13][NH:12][CH2:11][CH2:10]3)=[N:7][O:8][C:4]=2[CH:3]=1.C([O-])([O-])=O.[K+].[K+].Br[CH2:24][CH2:25][CH2:26][O:27][C:28]1[CH:33]=[CH:32][C:31]([CH2:34][C:35](=[O:39])[CH2:36][CH2:37][CH3:38])=[CH:30][C:29]=1[O:40][CH3:41]>C(#N)C>[F:1][C:2]1[CH:16]=[CH:15][C:5]2[C:6]([CH:9]3[CH2:10][CH2:11][N:12]([CH2:24][CH2:25][CH2:26][O:27][C:28]4[CH:33]=[CH:32][C:31]([CH2:34][C:35](=[O:39])[CH2:36][CH2:37][CH3:38])=[CH:30][C:29]=4[O:40][CH3:41])[CH2:13][CH2:14]3)=[N:7][O:8][C:4]=2[CH:3]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 8494213-(4-Piperidyl)-6-fluoro-1,2-benzisoxazoleHCID 57302745HCID 57302745, compound

Product 1

HCID 22023228HCID 22023228, compoundYield 68.7%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole (2.2 g, 10 mmol), K2CO3 (3 g), 1-[4-(3-bromopropoxy)-3-methoxyphenyl]pentanone (3.7 g, 11.3 mmol) in acetonitrile (140 ml) was heated at reflux for 4 hours. At the end of the reaction, the mixture was cooled and filtered. The filtrate was concentrated to an oil. Purification was performed by flash chromatography over a silica gel column (SiO2, 55 g; eluted with 1% methanol in dichloromethane, 600 ml; 3% methanol: 97% dichloromethane, 400 ml). The fractions containing pure product were pooled and concentrated to a solid (4.3 g, 91%). Recrystallization from ethanol (10 ml) gave a powdery solid of 1-[4-[3-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-3-methoxyphenyl]pentanone (3.22 g), m.p.=79°-80° C.

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 4 hours
  3. customAt the end of the reaction
  4. temperaturethe mixture was cooled
  5. filtrationfiltered
  6. concentrationThe filtrate was concentrated to an oil
  7. customPurification
  8. washwas performed by flash chromatography over a silica gel column (SiO2, 55 g; eluted with 1% methanol in dichloromethane, 600 ml; 3% methanol: 97% dichloromethane, 400 ml)
  9. additionThe fractions containing pure product
  10. concentrationconcentrated to a solid (4.3 g, 91%)
  11. customRecrystallization from ethanol (10 ml)

Sources & evidence

ORD record
ord-eab178ba15cc4ac7bc4ff0ce5b194fb8
Source dataset
uspto-grants-1997_07
Patent number
US05652241

Reaction notes

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