Potassium Carbonate → 4-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]butyl acetate fumarate

HRID 363622Notes

Reaction equation

HRID 363622 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+].[C:23]([O:26][CH2:27][CH2:28][CH2:29][CH2:30]Br)(=[O:25])[CH3:24].[C:32]([OH:39])(=[O:38])/[CH:33]=[CH:34]/[C:35]([OH:37])=[O:36]>C(#N)C.C(O)C>[C:32]([OH:39])(=[O:38])/[CH:33]=[CH:34]/[C:35]([OH:37])=[O:36].[C:23]([O:26][CH2:27][CH2:28][CH2:29][CH2:30][N:12]1[CH2:11][CH2:10][CH:9]([C:6]2[C:5]3[CH:15]=[CH:16][C:2]([F:1])=[CH:3][C:4]=3[O:8][N:7]=2)[CH2:14][CH2:13]1)(=[O:25])[CH3:24]

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 784911-Butanol, 4-bromo-, 1-acetateHCID 444972Fumaric AcidHCID 8494213-(4-Piperidyl)-6-fluoro-1,2-benzisoxazole

Product 1

HCID 219601044-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]butyl acetate fumarate

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 6342AcetonitrileSolvent

Procedure

A mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole (9.5 g, 41 mmol), K2CO3 (7.2 g, 51 mmol), and 4-bromobutyl acetate (10 g, 51 mmol) in acetonitrile (200 ml) was heated at reflux for 3.5 hours. At the end of the reaction, the solution was cooled and filtered. The inorganic salt was washed with DCM (50 ml). The organic solvent was removed. The residue was purified on a flash chromatography column (packed with Sorbsil C30 silica gel, 100 g, eluted with DCM, 1 liter, increasing methanol from to 4%, 2.51). The material thus purified weighed 12.92 g (89%). A small sample (1.67 g) was dissolved in ethanol and treated with 1 equivalent of fumaric acid (580 mg) in ethanol to yield white crystals: 1.8 g, m.p.=142°-143° C.

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 3.5 hours
  3. customAt the end of the reaction
  4. temperaturethe solution was cooled
  5. filtrationfiltered
  6. washThe inorganic salt was washed with DCM (50 ml)
  7. customThe organic solvent was removed
  8. customThe residue was purified on a flash chromatography column (packed with Sorbsil C30 silica gel, 100 g, eluted with DCM, 1 liter, increasing methanol from to 4%, 2.51)
  9. customThe material thus purified
  10. dissolutionA small sample (1.67 g) was dissolved in ethanol
  11. customto yield white crystals

Sources & evidence

ORD record
ord-389393a62764471ba075200e1bdb71fe
Source dataset
uspto-grants-1999_02
Patent number
US05874435

Reaction notes

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