Reaktion #351702

Reaktionsgleichung

(RS)-2-(2-oxoethyl)-4-methyl-1-indanone

p-toluenesulfonic acid

water

(RS)-1-amino-2-propanol

→

(RS)-1-(5-methyl-1,4-dihydro-indeno[1,2-b]pyrrol-1-yl)-propan-2-ol

Ausbeute 28.0%

Lösungsmittel

toluene

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe cooled reaction mixture
2. 2
   Sonstigewas purified by column chromatography on silica gel (diethyl ether/hexane 7:3)

Vorschrift

A solution of 1.9 g of (RS)-2-(2-oxoethyl)-4-methyl-1-indanone and 80 mg of p-toluenesulfonic acid in 70 ml of anhydrous toluene was heated on a water separator, A solution of 3.0 g of (RS)-1-amino-2-propanol in 20 ml of anhydrous toluene was added dropwise to the boiling solution over a period of 5 minutes. Subsequently, the mixture was boiled for an additional 45 minutes, during which the solvent was reduced to a volume of 20 ml. The cooled reaction mixture was purified by column chromatography on silica gel (diethyl ether/hexane 7:3). 0.63 g (28%) of (RS)-1-(5-methyl-1,4-dihydro-indeno[1,2-b]pyrrol-1-yl)-propan-2-ol was obtained as a white solid which was used directly in the next reaction.

Quelle