Potassium Carbonate → 1-[4-[3-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-3methylphenyl]ethanone hemifumarate

HRID 1902006Notes

Reaction equation

HRID 1902006 reaction equation
Cl.[F:2][C:3]1[CH:17]=[CH:16][C:6]2[C:7]([CH:10]3[CH2:15][CH2:14][NH:13][CH2:12][CH2:11]3)=[N:8][O:9][C:5]=2[CH:4]=1.C([O-])([O-])=O.[K+].[K+].Br[CH2:25][CH2:26][CH2:27][O:28][C:29]1[CH:34]=[CH:33][C:32]([C:35](=[O:37])[CH3:36])=[CH:31][C:30]=1[CH3:38].[C:39]([OH:46])(=[O:45])/[CH:40]=[CH:41]/[C:42]([OH:44])=[O:43]>CN(C)C=O.C(#N)C.C(O)C>[C:39]([OH:46])(=[O:45])/[CH:40]=[CH:41]/[C:42]([OH:44])=[O:43].[F:2][C:3]1[CH:17]=[CH:16][C:6]2[C:7]([CH:10]3[CH2:11][CH2:12][N:13]([CH2:25][CH2:26][CH2:27][O:28][C:29]4[CH:34]=[CH:33][C:32]([C:35](=[O:37])[CH3:36])=[CH:31][C:30]=4[CH3:38])[CH2:14][CH2:15]3)=[N:8][O:9][C:5]=2[CH:4]=1.[F:2][C:3]1[CH:17]=[CH:16][C:6]2[C:7]([CH:10]3[CH2:11][CH2:12][N:13]([CH2:25][CH2:26][CH2:27][O:28][C:29]4[CH:34]=[CH:33][C:32]([C:35](=[O:37])[CH3:36])=[CH:31][C:30]=4[CH3:38])[CH2:14][CH2:15]3)=[N:8][O:9][C:5]=2[CH:4]=1

Participants

8

Reactant 4

HCID 11430Potassium CarbonateHCID 444972Fumaric AcidHCID 99933191-[4-(3-Bromopropoxy)-3-methylphenyl]ethanoneHCID 11334359R-56109 hydrochloride

Product 1

HCID 1317187791-[4-[3-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-3methylphenyl]ethanone hemifumarate

Reagents, catalysts & solvents 3

HCID 702EthanolSolvent2×HCID 6228DimethylformamideSolventHCID 6342AcetonitrileSolvent

Conditions

Temperature
95 °C

Procedure

A stirred mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole hydrochloride (3.0 g; 11.7 mmol), K2CO3 (3.0 g), and 1-[4-(3-bromopropoxy)-3-methylphenyl]ethanone (3.19 g) in dimethylformamide (20 ml) and acetonitrile (50 ml) was heated at 95° C. for 4 hours. At the end of the reaction, the solvent was concentrated down to about 30 ml, then partitioned between water (200 ml) and dichloromethane (300 ml). The dichloromethane solution was separated and washed with water and brine, then dried over MgSO4. The crude product from the evaporated solution was purified by flash chromatography over a silica gel column (SiO2, 60 g, eluted with 1% methanol in dichloromethane, 600 ml; 2% methanol in dichloromethane, 600 ml). The material thus obtained was a light yellow oil, weight: 2.07 g (43%). This oil was dissolved in ethanol and treated with a solution of fumaric acid (585 mg) in ethanol. The 1-[4-[3-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-3-methylphenyl]-ethanone hemifumarate crystals formed on cooling at 0° C. This was collected and weighed 1.5 g, m.p.=185°-187° C.

Workup

  1. customAt the end of the reaction
  2. concentrationthe solvent was concentrated down to about 30 ml
  3. custompartitioned between water (200 ml) and dichloromethane (300 ml)
  4. customThe dichloromethane solution was separated
  5. washwashed with water and brine
  6. dry with materialdried over MgSO4
  7. customThe crude product from the evaporated solution was purified by flash chromatography over a silica gel column (SiO2, 60 g, eluted with 1% methanol in dichloromethane, 600 ml; 2% methanol in dichloromethane, 600 ml)
  8. customThe material thus obtained

Sources & evidence

ORD record
ord-fccbf2fa9fac464a9b0b2e3f8c57c942
Source dataset
uspto-grants-1996_11
Patent number
US05578624

Reaction notes

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