Potassium Carbonate → N-[3-[4-(6-fluoro-1,2-benzisoxazol-3-yl)piperidinyl]propyl]phthalimide

HRID 266985Notes

Reaction equation

HRID 266985 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][N:27]1[C:31](=[O:32])[C:30]2=[CH:33][CH:34]=[CH:35][CH:36]=[C:29]2[C:28]1=[O:37]>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][N:27]4[C:31](=[O:32])[C:30]5=[CH:33][CH:34]=[CH:35][CH:36]=[C:29]5[C:28]4=[O:37])[CH2:13][CH2:14]3)=[N:7][O:8][C:4]=2[CH:3]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 21611N-3-BromopropylphthalimideHCID 8494213-(4-Piperidyl)-6-fluoro-1,2-benzisoxazole

Product 1

HCID 15816943N-[3-[4-(6-fluoro-1,2-benzisoxazol-3-yl)piperidinyl]propyl]phthalimide

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole (6.44 g, 29.1 mmole), K2CO3 (6.4 g, 46 mmol), N-(3-bromopropyl)phthalimide (8.4 g, 31 mmol) in acetonitrile (150 ml) was heated at reflux for 3.5 hours. The insolubles were filtered. The solvent was removed at reduced pressure and the residue was purified by silica gel column chromatography to give N-[3-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propyl]phthalimide as a white solid. Recrystallization from ethanol yielded 9.8 g (83%) of off-white crystals, m.p.=129°-130° C.

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 3.5 hours
  3. filtrationThe insolubles were filtered
  4. customThe solvent was removed at reduced pressure
  5. customthe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-83ed8e8e6db741b29c62753a063e279b
Source dataset
uspto-grants-1997_07
Patent number
US05652241

Reaction notes

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