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

HRID 1683561Notes

Reaction equation

HRID 1683561 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-b4ed47454c664c6baaab42e982b2d504
Source dataset
uspto-grants-1997_06
Patent number
US05637710

Reaction notes

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