Reaktion #456841

Reaktionsgleichung

3,5-dichloro-1-(3,3-dichloro-2-propenyloxy)-4-(4-(3-chloro-4,4-difluoro-2-hydroxy-3-butenyloxy)butyloxy)benzene

diethylaminosulfur trifluoride

water

→

(Z)-3,5-dichloro-1-(3,3-dichloro-2-propenyloxy)-4-(4-(3-chloro-4,4,4-trifluoro-2-butenyloxy)butyloxy)benzene

Ausbeute 55.3%

Lösungsmittel

dichloromethane

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONAfter complement of the dropwise addition
2. 2
   SonstigeThe dichloromethane layer was separated
3. 3
   Waschenwashed with water
4. 4
   Trocknendried over magnesium sulfate
5. 5
   Sonstigeevaporated
6. 6
   Sonstigeto give a crude product

Vorschrift

A solution of 0.36 g of 3,5-dichloro-1-(3,3-dichloro-2-propenyloxy)-4-(4-(3-chloro-4,4-difluoro-2-hydroxy-3-butenyloxy)butyloxy)benzene in 5 ml of dichloromethane was slowly added dropwise to a solution of 0.12 g of diethylaminosulfur trifluoride (DAST) in 10 ml of dichloromethane with stirring at -78° C. After complement of the dropwise addition, the reaction mixture was returned to room temperature over 30 minutes and poured into water. The dichloromethane layer was separated, washed with water, dried over magnesium sulfate and then evaporated to give a crude product. The crude product was subjected to silica gel chromatography, which afforded 0.20 g of (Z)-3,5-dichloro-1-(3,3-dichloro-2-propenyloxy)-4-(4-(3-chloro-4,4,4-trifluoro-2-butenyloxy)butyloxy)benzene (yield, 55%), nD23.7 1.5160.

Quelle