p-Bromoacetophenone → 4-Bromo-1-(1,3-dithian-2-yl)ethylbenzene

HRID 235421

Reaktionsgleichung

Reaktionsgleichung von HRID 235421
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=O)[CH3:9])=[CH:4][CH:3]=1.[CH2:11]([SH:15])[CH2:12][CH2:13][SH:14].B(F)(F)F.[CH3:20]COCC>ClC(Cl)Cl.ClCCl>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]([CH:9]2[S:15][CH2:11][CH2:12][CH2:13][S:14]2)[CH3:20])=[CH:4][CH:3]=1

Komponenten

6

Edukt 3

HCID 7466p-BromoacetophenoneHCID 8000Boron trifluoride etherateHCID 80131,3-Propanedithiol

Produkt 1

HCID 219601124-Bromo-1-(1,3-dithian-2-yl)ethylbenzene

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6212ChloroformLösungsmittelHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To the compound p-bromoacetophenone (36.85 g, 185 mmol) in trichloromethane (300 ml) was added 1,3-propanedithiol (25 g, 230 mmol) and boron trifluoride etherate (3 ml). The resulting mixture was stirred at room temperature for 48 hours. The mixture was diluted with dichloromethane (500 ml), washed twice with 10% sodium hydroxide (200 ml), water, and brine, and then dried (Na2SO4). The product was concentrated to an oil. A portion was stirred with ether (100 ml) and a crystalline product was formed. The crystalline product was recovered by filtration and purified by recrystallization to yield 4-bromo-1-(1,3-dithian-2-yl)ethylbenzene.

Aufarbeitung

  1. washwashed twice with 10% sodium hydroxide (200 ml), water, and brine
  2. dry with materialdried (Na2SO4)
  3. concentrationThe product was concentrated to an oil
  4. stirringA portion was stirred with ether (100 ml)
  5. customa crystalline product was formed
  6. filtrationThe crystalline product was recovered by filtration
  7. custompurified by recrystallization

Quellen und Nachweise

ORD-Eintrag
ord-502ee71b6a37491eaa78a96c66ddffb0
Quelldatensatz
uspto-grants-1997_01
Patentnummer
US05597842

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