Potassium Carbonate → HCID 21960068, compound

HRID 2257666Notes

Reaction equation

HRID 2257666 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+].[CH3:23][O:24][CH2:25][CH2:26]Br.[C:28]([OH:35])(=[O:34])/[CH:29]=[CH:30]/[C:31]([OH:33])=[O:32]>C(#N)C.C(O)C>[C:28]([OH:35])(=[O:34])/[CH:29]=[CH:30]/[C:31]([OH:33])=[O:32].[CH3:23][O:24][CH2:25][CH2:26][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

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 809722-Bromoethyl methyl etherHCID 444972Fumaric AcidHCID 8494213-(4-Piperidyl)-6-fluoro-1,2-benzisoxazole

Product 1

HCID 21960068HCID 21960068, compound

Reagents, catalysts & solvents 2

HCID 702EthanolSolvent2×HCID 6342AcetonitrileSolvent

Procedure

A mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole (3.75 gm, 17 mmol), K2CO3 (3 gm, 21.7 mmol), bromoethyl methyl ether (2.84 gm, 20.4 mmol) in acetonitrile (150 ml) was heated at reflux for 3.5 hr. The reaction was cooled. The inorganics were filtered and rinsed with DCM. The organic solution was concentrated down to an oil (7 gm). Purification on a flash chromatography column (SiO2, 45 gm; eluted with methanol/DCM) gave a light yellow oil as product (4 gm, 87%). This oil was dissolved into ethanol and treated with a solution of fumaric acid (1.67 gm) in ethanol (20 ml). White crystals (5.15 gm) were collected, m.p.=157°-158° C.

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 3.5 hr
  3. temperatureThe reaction was cooled
  4. filtrationThe inorganics were filtered
  5. washrinsed with DCM
  6. concentrationThe organic solution was concentrated down to an oil (7 gm)
  7. customPurification
  8. washon a flash chromatography column (SiO2, 45 gm; eluted with methanol/DCM)
  9. customgave a light yellow oil as product (4 gm, 87%)
  10. customWhite crystals (5.15 gm) were collected

Sources & evidence

ORD record
ord-6a52bf55a5d04bdabeb47d7f1047fffe
Source dataset
uspto-grants-1997_08
Patent number
US05658911

Reaction notes

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