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Potassium Carbonate → 6-Fluoro-3-[1-[3-(2-methoxyphenoxy)propyl]-4-piperidinyl]-1,2-benzisoxazole fumarate

HRID 233827
Notes
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Reaction equation

HRID 233827 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][C:25]1[CH:35]=[CH:34][CH:33]=[CH:32][C:26]=1[O:27][CH2:28][CH2:29][CH2:30]Cl.[C:36]([OH:43])(=[O:42])/[CH:37]=[CH:38]/[C:39]([OH:41])=[O:40]>C(#N)C.C(O)C>[C:36]([OH:43])(=[O:42])/[CH:37]=[CH:38]/[C:39]([OH:41])=[O:40].[F:1][C:2]1[CH:16]=[CH:15][C:5]2[C:6]([CH:9]3[CH2:10][CH2:11][N:12]([CH2:30][CH2:29][CH2:28][O:27][C:26]4[CH:32]=[CH:33][CH:34]=[CH:35][C:25]=4[O:24][CH3:23])[CH2:13][CH2:14]3)=[N:7][O:8][C:4]=2[CH:3]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 444972Fumaric AcidHCID 8494213-(4-Piperidyl)-6-fluoro-1,2-benzisoxazoleHCID 147153523-(2-Methoxyphenoxy)propyl chloride

Product 1

HCID 219600506-Fluoro-3-[1-[3-(2-methoxyphenoxy)propyl]-4-piperidinyl]-1,2-benzisoxazole fumarate

Reagents, catalysts & solvents 2

HCID 702
Ethanol
Solvent
HCID 6342AcetonitrileSolvent

Conditions

Temperature
90 °C

Procedure

A stirred mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole (2.45 g; 11.1 mmol), K2CO3 (2.0 g), and 3-(2-methoxyphenoxy)propyl chloride (3.5 g, 17.4 mmol) in acetonitrile (40 ml) was heated at 90° C. for 4 hours. At the end of the reaction, the solvent was removed, and the solids were dissolved into dichloromethane (100 ml). The solution was washed with water and brine, then dried over MgSO4. The crude material from the solution was combined with 1.2 g of crude material prepared in the same fashion (using 0.5 g of starting material). The combined material was purified by flash chromatography on a silica gel column (49 g, eluted with 0.5% diethylamine: 1% methanol:98.5% dichloromethane, 1 L). The fractions containing the pure product were pooled and concentrated down to a light oil (3.68 g). This oil was treated with fumaric acid (1.14 g, 9.8 mmol) in ethanol (13 ml). The 6-fluoro-3-[1-[3-(2-methoxyphenoxy)-propyl]-4-piperidinyl]-1,2-benzisoxazole fumarate crystals obtained weighed 4.01 g (60%), m.p.=169°-170° C.

Workup

  1. customAt the end of the reaction
  2. customthe solvent was removed
  3. dissolutionthe solids were dissolved into dichloromethane (100 ml)
  4. washThe solution was washed with water and brine
  5. dry with materialdried over MgSO4
  6. customprepared in the same fashion (using 0.5 g of starting material)
  7. customThe combined material was purified by flash chromatography on a silica gel column (49 g, eluted with 0.5% diethylamine: 1% methanol:98.5% dichloromethane, 1 L)
  8. additionThe fractions containing the pure product
  9. concentrationconcentrated down to a light oil (3.68 g)

Sources & evidence

ORD record
ord-4838c9cca9bb4c0d9e30f0b38a0a39a6
Source dataset
uspto-grants-1997_01
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05593995

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes