[CH3:1][O:2][C:3]1[CH:11]=[C:10]2[C:6]([CH2:7][CH:8]([CH2:13][C:14](=O)[CH3:15])[C:9]2=O)=[CH:5][CH:4]=1.O.[NH2:18][CH2:19][C@H:20]([OH:22])[CH3:21]>C1(C)C=CC=CC=1.C1(C)C=CC(S(O)(=O)=O)=CC=1>[CH3:1][O:2][C:3]1[CH:11]=[C:10]2[C:6]([CH2:7][C:8]3[CH:13]=[C:14]([CH3:15])[N:18]([CH2:19][C@H:20]([OH:22])[CH3:21])[C:9]=32)=[CH:5][CH:4]=1
A solution of 1.45 g of (RS)-6-methoxy-2-(2-oxopropyl)-1-indanone and 60 mg of p-toluenesulfonic acid in 70 ml of anhydrous toluene was heated on a water separator. A solution of 2.0 g of (R)-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 90 minutes, during which time the solvent was reduced to a volume of 20 ml. The cooled reaction mixture was purified by column chromatography on silica gel (ethyl acetate/toluene 2:3). 1.05 g (61%) of (R)-1-(7-methoxy-2-methyl-1,4-dihydro-indeno[1,2-b]pyrrol-1-yl)-propan-2-ol were obtained as a yellow solid with m.p. 110°.
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