Reaktion #321850

Reaktionsgleichung

cyclopropylmagnesium bromide

thioxanthen-9-one

ammonium chloride

→

9-cyclopropyl-9H-thioxanthen-9-ol

Lösungsmittel

water

THF

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONwhen addition
2. 2
   Temperaturwas heated
3. 3
   Temperaturat reflux for 20 minutes
4. 4
   TemperaturThe reaction mixture was cooled on an ice-bath
5. 5
   Extraktionextracted with diethyl ether (2×100 ml)
6. 6
   WaschenThe combined organic extracts were washed with water
7. 7
   Trocknendried (Na2SO4)
8. 8
   Sonstigethe solvent was evaporated in vacuo

Vorschrift

A solution of cyclopropylmagnesium bromide in dry THF (prepared from cyclopropylbromide (18.2 g, 0.15 mol), magnesium turnings (2.9 g, 0.12 mol) and dry THF (80 ml)) was placed under an atmosphere of nitrogen. A solution of thioxanthen-9-one (12.7 g, 0.06 mol) in dry THF (70 ml) was added dropwise and when addition was complete the mixture was heated at reflux for 20 minutes. The reaction mixture was cooled on an ice-bath and saturated ammonium chloride (70 ml) was carefully added. The mixture was diluted with water (100 ml) and extracted with diethyl ether (2×100 ml). The combined organic extracts were washed with water, dried (Na2SO4) and the solvent was evaporated in vacuo to give 25.2 g of crude 9-cyclopropyl-9H-thioxanthen-9-ol.

Quelle