Reaktionsgleichung
[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:17]([O-:20])([O-:19])=O.[K+].[K+].Br[CH2:24][C:25]([CH3:29])([CH3:28])[CH2:26][OH:27]>S([O-])(O)(=O)=O.C([N+](CCCC)(CCCC)CCCC)CCC.O.C(#N)C>[C:4]([OH:27])(=[O:8])/[CH:5]=[CH:15]/[C:17]([OH:20])=[O:19].[F:1][C:2]1[CH:16]=[CH:15][C:5]2[C:6]([CH:9]3[CH2:10][CH2:11][N:12]([CH2:24][C:25]([CH3:29])([CH3:28])[CH2:26][OH:27])[CH2:13][CH2:14]3)=[N:7][O:8][C:4]=2[CH:3]=1Komponenten
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 3
Versuchsvorschrift
A mixture of 4-(6-fluoro-1,2-benzisoxazol-3-yl)piperidine (3.0 g, 13.6 mmol), K2CO3 (12.5 g, 17.5 mmol), 3-bromo-2,2-dimethyl-1-propanol (3 g, 21 mmol, 1.5 eq.), tetra-butylammonium hydrogen sulfate (1 g, phase transfer catalyst) in water (5 ml) and acetonitrile (150 ml) was heated at reflux for 43 days. TLC showed a small spot for the expected product. The mixture was diluted with EtOAc (400 ml) and washed with brine. The organic solution was dried and concentrated to a dark brown mixture. The crude mixture was purified carefully by flash chromatography (SiO2, 95 g to afford the dried pure product; 260 mg, (6%) as an oil. This oil was converted to the fumarate salt by treatment with fumaric acid (98.5 mg, 1.0 eq.) in ethanol. Recrystallization from ethanol:ether yielded 210 mg of white crystals, m.p.=144°-145° C.
Aufarbeitung
- temperaturewas heated
- temperatureat reflux for 43 days
Quellen und Nachweise
- ORD-Eintrag
- ord-2dce30ff40734d5d8654c3df22a123f3
- Quelldatensatz
- uspto-grants-1997_04
- Patentnummer
- US05624927
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