Potassium Carbonate → N,N-dimethyl-4-[3-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-3-methoxybenzamide

HRID 1079523Notes

Reaction equation

HRID 1079523 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.[CH3:17][N:18]([CH3:34])[C:19](=[O:33])[C:20]1[CH:25]=[CH:24][C:23]([O:26][CH2:27][CH2:28][CH2:29]Br)=[C:22]([O:31][CH3:32])[CH:21]=1.C([O-])([O-])=O.[K+].[K+]>C(#N)C>[CH3:34][N:18]([CH3:17])[C:19](=[O:33])[C:20]1[CH:25]=[CH:24][C:23]([O:26][CH2:27][CH2:28][CH2:29][N:12]2[CH2:11][CH2:10][CH:9]([C:6]3[C:5]4[CH:15]=[CH:16][C:2]([F:1])=[CH:3][C:4]=4[O:8][N:7]=3)[CH2:14][CH2:13]2)=[C:22]([O:31][CH3:32])[CH:21]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 8494213-(4-Piperidyl)-6-fluoro-1,2-benzisoxazoleHCID 10358359N,N-dimethyl4 bromopropoxy-3-methoxybenzamide

Product 1

HCID 10049666N,N-dimethyl-4-[3-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-3-methoxybenzamide

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A stirred mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole (3.9 g, 17.7 mmol), N,N-dimethyl-4-bromopropoxy-3-methoxybenzamide (5.54 g, 17.5 mmol) and K2CO3 (3 g) in acetonitrile (250 ml) was heated at reflux for one hour. At the end of the reaction, the insolubles were filtered and washed with dichloromethane. The solvent was removed on a rotary evaporator. The residue was purified by flash chromatography over a silica gel column. The product thus obtained as an oil weighed 7 g. Crystallization front hot ethanol (45 ml) afforded analytically pure N,N -dimethyl-4-[3-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-3-methoxybenzamide, 3.95 g, 50%, as light yellow crystals, m.p.=126°-127° C.

Workup

  1. temperaturewas heated
  2. temperatureat reflux for one hour
  3. customAt the end of the reaction
  4. filtrationthe insolubles were filtered
  5. washwashed with dichloromethane
  6. customThe solvent was removed on a rotary evaporator
  7. customThe residue was purified by flash chromatography over a silica gel column
  8. customThe product thus obtained as an oil
  9. customCrystallization front hot ethanol (45 ml)

Sources & evidence

ORD record
ord-fc6dbf2738ef4620acb7b28daab65694
Source dataset
uspto-grants-1996_12
Patent number
US05580875

Reaction notes

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