Reaktion #444900

Reaktionsgleichung

indene

X-100

hydrogen bromide

hydrogen peroxide

→

trans-2-bromoindan-1-ol

Ausbeute 83.9%

Lösungsmittel

dichloromethane

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONwas added dropwise over 4 hours and 20 minutes
2. 2
   workup.STIRRINGAfter stirring for 2 hours at the same temperature
3. 3
   workup.STIRRINGstirring
4. 4
   workup.STIRRINGafter stirring at room temperature for 1 hour it
5. 5
   Filtrationwas filtered
6. 6
   SonstigeThe wet crystals were dried

Vorschrift

237 ml of water, 173.9 g of indene (92 wt %; 1.38 mol), 2.8 g of Triton X-100 and 262.0 g of hydrogen bromide (47 wt %; 1.52 mol, 1.1 mol/mol indene) were put into a 1000-ml 3-mouthed flask, and emulsified by stirring together with a magnetic stirrer. The emulsion was stirred at 60° C. as 147.2 g of hydrogen peroxide (35 wt %; 1.52 mol, 1.1 mol/mol indene) was added dropwise over 4 hours and 20 minutes. After stirring for 2 hours at the same temperature, stirring was continued at room temperature overnight. 200 ml of dichloromethane was added to the reaction mixture, and after stirring at room temperature for 1 hour it was filtered at decreased pressure. The wet crystals were dried, to obtain 246.1 g of pale yellow crystals of trans-2-bromoindan-1-ol (yield 83.9%; GC purity 97.0%).

Quelle