Dimethylformamide → Desfluoro Iloperidone (Impurity)

HRID 1079907Notes

Reaction equation

HRID 1079907 reaction equation
Cl.[NH:2]1[CH2:7][CH2:6][CH:5]([C:8]2[C:12]3[CH:13]=[CH:14][CH:15]=[CH:16][C:11]=3[O:10][N:9]=2)[CH2:4][CH2:3]1.C([O-])([O-])=O.[K+].[K+].Cl[CH2:24][CH2:25][CH2:26][O:27][C:28]1[CH:33]=[CH:32][C:31]([C:34](=[O:36])[CH3:35])=[CH:30][C:29]=1[O:37][CH3:38].CN(C)C=O>O>[O:10]1[C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=2[C:8]([CH:5]2[CH2:4][CH2:3][N:2]([CH2:24][CH2:25][CH2:26][O:27][C:28]3[CH:33]=[CH:32][C:31]([C:34](=[O:36])[CH3:35])=[CH:30][C:29]=3[O:37][CH3:38])[CH2:7][CH2:6]2)=[N:9]1

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 73142644-(3-Chloropropoxy)-3-methoxyacetophenoneHCID 130764373-(4-Piperidinyl)-1,2-benzisoxazole Hydrochloride

Product 1

HCID 10024423Desfluoro Iloperidone (Impurity)Yield 47.7%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A mixture of 3-(4-piperidinyl)-1,2-benzisoxazole hydrochloride (4.8 g, 20 mmol), K2CO3 (5.2 g, 40 mmol), 1-[4-(3-chloropropoxy)-3-methoxyphenyl]ethanone (5.3 g, 22 mmol), a few crystals of KI and dimethylformamide (60 ml) was stirred at 90 C. for 16 hours. The reaction was poured into water and the aqueous mixture was extracted with ethyl acetate. The extract was washed (water), dried (MgSO4) and concentrated to afford a brown oil. The oil was chromatographed on a Waters Prep 500 utilizing silica gel columns and ethyl acetate-diethylamine (2%), as eluent. Concentration of the appropriate fractions afforded 3.9 g of product as an off-white solid. Recrystallization from absolute ethyl alcohol afforded 2.6 g (33%) of 1-[4-[3-[4-(1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-3-methoxypehenyl]ethanone, m.p.=102°-104° C., as colorless needles.

Workup

  1. extractionthe aqueous mixture was extracted with ethyl acetate
  2. washThe extract was washed (water)
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated
  5. customto afford a brown oil
  6. customThe oil was chromatographed on a Waters Prep 500 utilizing silica gel columns and ethyl acetate-diethylamine (2%), as eluent

Sources & evidence

ORD record
ord-f3f51ac021624790a4fc48a80909b7b1
Source dataset
uspto-grants-1996_12
Patent number
US05580890

Reaction notes

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