2-Naphthalenethiol → 3-(Naphth-2-ylthio)propiophenone

HRID 1534618Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1534618
[CH:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1[SH:11].Br[CH2:13][CH2:14][C:15]([C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)=[O:16].[OH-].[Na+]>CN(C)C=O>[CH:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1[S:11][CH2:13][CH2:14][C:15]([C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)=[O:16]

Komponenten

5

Edukt 3

HCID 70582-NaphthalenethiolHCID 14798Sodium HydroxideHCID 1224323-Bromo-1-phenylpropan-1-one

Produkt 1

HCID 126670543-(Naphth-2-ylthio)propiophenoneAusbeute 22,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

A mixture of 2-naphthalenethiol (12.94 g), 3-bromopropiophenone (17.35 g), cuprous oxide (5.83 g), sodium hydroxide (3.24 g) and dimethylformamide (130 ml) was heated to reflux for 18 hours. The mixture was concentrated and the residue was partitioned between diethyl ether and water. The organic phase was dried (MgSO4) and evaporated. The residue was dissolved in a mixture of ethyl acetate and hexane and treated with charcoal. The solution was filtered and evaporated. The residue was recrystallised from a mixture of methanol and water to give 3-(naphth-2-ylthio)propiophenone (5.23 g, 22%), m.p. 90°-91° C.

Aufarbeitung

  1. temperaturewas heated
  2. temperatureto reflux for 18 hours
  3. concentrationThe mixture was concentrated
  4. customthe residue was partitioned between diethyl ether and water
  5. dry with materialThe organic phase was dried (MgSO4)
  6. customevaporated
  7. dissolutionThe residue was dissolved in a mixture of ethyl acetate and hexane
  8. additiontreated with charcoal
  9. filtrationThe solution was filtered
  10. customevaporated
  11. customThe residue was recrystallised from a mixture of methanol and water

Quellen und Nachweise

ORD-Eintrag
ord-3feff9f4105649b3a60f2d7dec1ba684
Quelldatensatz
uspto-grants-1992_02
Patentnummer
US05089513

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