Reaktion #1563930

Reaktionsgleichung

4-chloro-1-(2,5-difluorophenyl)butan-1-one

(S)-2-methylpropane-2-sulfinamide

→

title compound

Ausbeute 86.4%

(S,E)-N-(4-chloro-1-(2,5-difluorophenyl)butylidene)-2-methylpropane-2-sulfinamide

Ausbeute 86.4%

Lösungsmittel

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGThe mixture was stirred continuously at 70° C. for 16 h
2. 2
   SonstigeReaction mixture
3. 3
   Sonstigequenched with saturated aqueous NH4Cl solution
4. 4
   workup.ADDITIONdiluted with ethylacetate
5. 5
   Filtrationfiltered
6. 6
   WaschenThe filtrate was washed with water
7. 7
   SonstigeThe organic layer was separated
8. 8
   Trocknendried over anhydrous sodium sulfate
9. 9
   Einengenconcentrated under reduced pressure

Vorschrift

Titanium (IV) ethoxide (54.77 g, 240.13 mmol) was added to a solution of 4-chloro-1-(2,5-difluorophenyl)butan-1-one (35 g, 160.09 mmol) and (S)-2-methylpropane-2-sulfinamide (29.1 g, 240.13 mmol) in THF (400 mL) with stirring. The mixture was stirred continuously at 70° C. for 16 h. Reaction mixture was then cooled to a temperature of 20-35° C., quenched with saturated aqueous NH4Cl solution, diluted with ethylacetate and filtered. The filtrate was washed with water followed by brine solution. The organic layer was separated, dried over anhydrous sodium sulfate and concentrated under reduced pressure to afford 44.5 g of the title compound as a colourless liquid.

Quelle