Hexane → HCID 59750887, Verbindung

HRID 748753Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 748753
Br[C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[F:9].CCCCCC.C([Li])CCC.[Si:21]([O:38][CH2:39][CH2:40][CH2:41][CH2:42][CH2:43][CH2:44][CH:45]=[O:46])([C:34]([CH3:37])([CH3:36])[CH3:35])([C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1>C(OCC)(=O)C.C(OCC)C.O1CCCC1>[Si:21]([O:38][CH2:39][CH2:40][CH2:41][CH2:42][CH2:43][CH2:44][CH:45]([C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[F:9])[OH:46])([C:34]([CH3:36])([CH3:37])[CH3:35])([C:28]1[CH:29]=[CH:30][CH:31]=[CH:32][CH:33]=1)[C:22]1[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=1

Komponenten

8

Edukt 4

HCID 8058HexaneHCID 678622-Bromo-1,4-difluorobenzeneHCID 108831267-(t-butyldiphenylsilyloxy)heptanalHCID 178418339Butyllithium

Produkt 1

HCID 59750887HCID 59750887, VerbindungAusbeute 90,3 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 3283Diethyl EtherLösungsmittelHCID 8028TetrahydrofuranLösungsmittel2×HCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A tetrahydrofuran (40 ml) solution of 1-bromo-2,5-difluorobenzene (1.21 ml, 10.7 mmol) was stirred at −78° C., followed by the addition of a hexane solution (8.50 ml, 13.4 mmol) of n-butyl lithium. The reaction mixture was added to a tetrahydrofuran (20 ml) solution of 7-(t-butyldiphenylsilyloxy)heptanal (3.28 g, 8.90 mmol) at −78° C. and the mixture was stirred at the same temperature for 30 minutes. After the temperature of the reaction mixture was elevated to room temperature, diethyl ether was added thereto. The mixture was washed with a saturated aqueous solution of ammonium chloride. The organic layer was then dried over anhydrous sodium sulfate. After filtration, the filtrate was concentrated under reduced pressure. The residue was subjected to flash silica gel chromatography, and the fraction obtained from the hexane:ethyl acetate=9:1 eluate was concentrated under reduced pressure, whereby the title compound (3.88 g, 8.04 mmol, 90%) was obtained as a colorless oil.

Aufarbeitung

  1. customwas elevated to room temperature
  2. washThe mixture was washed with a saturated aqueous solution of ammonium chloride
  3. dry with materialThe organic layer was then dried over anhydrous sodium sulfate
  4. filtrationAfter filtration
  5. concentrationthe filtrate was concentrated under reduced pressure
  6. customthe fraction obtained from the hexane

Quellen und Nachweise

ORD-Eintrag
ord-951c175a85c84c2ea921d20ebbaa3503
Quelldatensatz
uspto-grants-2008_07
Patentnummer
US07399775B2

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