Acetonitrile → N-[3-[4-(6-Fluoro-1,2-benzisoxazol-3yl)-1-piperidinyl]propyl]-6-acetyl-2-benzoxazolinone

HRID 55619Notes

Reaction equation

HRID 55619 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.Cl[CH2:18][CH2:19][CH2:20][N:21]1[C:25]2[CH:26]=[CH:27][C:28]([C:30](=[O:32])[CH3:31])=[CH:29][C:24]=2[O:23][C:22]1=[O:33].C([O-])([O-])=O.[K+].[K+].C(#N)C>O>[F:1][C:2]1[CH:16]=[CH:15][C:5]2[C:6]([CH:9]3[CH2:10][CH2:11][N:12]([CH2:18][CH2:19][CH2:20][N:21]4[C:25]5[CH:26]=[CH:27][C:28]([C:30](=[O:32])[CH3:31])=[CH:29][C:24]=5[O:23][C:22]4=[O:33])[CH2:13][CH2:14]3)=[N:7][O:8][C:4]=2[CH:3]=1

Participants

6

Reactant 4

HCID 6342AcetonitrileHCID 11430Potassium CarbonateHCID 8494213-(4-Piperidyl)-6-fluoro-1,2-benzisoxazoleHCID 10400030N-(3-chloropropyl)-6-acetyl-2-benzoxazolinone

Product 1

HCID 10071753N-[3-[4-(6-Fluoro-1,2-benzisoxazol-3yl)-1-piperidinyl]propyl]-6-acetyl-2-benzoxazolinoneYield 31%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole (2.0 g, 9 mmol), N-(3-chloropropyl)-6-acetyl-2-benzoxazolinone (2.4 g, 9 mmol), K2CO3 (3.6 g), a few crystals of KI, and acetonitrile (50 ml) was stirred and refluxed for 13 hours. The reaction was poured into water, and a dark, brown solid that separated was collected to afford 3.3 g of crude product. The solid was chromatographed on a Waters Prep 500 HPLC. 22 Concentration of appropriate fractions afforded 2.3 g of a yellow solid, and recrystallization from ethyl acetate yielded 1.2 g (31%) of N-[3-[4-(6-fluoro-1,2-benzisoxazol-3yl)-1-piperidinyl]propyl]-6-acetyl-2-benzoxazolinone, m.p.=152°-154° C.

Workup

  1. temperaturerefluxed for 13 hours
  2. customa dark, brown solid that separated was collected
  3. customto afford 3.3 g of crude product
  4. customThe solid was chromatographed on a Waters Prep 500 HPLC
  5. custom22 Concentration of appropriate fractions afforded
  6. custom2.3 g of a yellow solid, and recrystallization from ethyl acetate

Sources & evidence

ORD record
ord-df41811bbf2d475a9284d16a61c86f74
Source dataset
uspto-grants-1997_04
Patent number
US05624927

Reaction notes

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