O=[CH:2][CH2:3][CH:4]1[C:12]([CH3:14])([CH3:13])[C:11]2[C:6](=[CH:7][C:8]([F:15])=[CH:9][CH:10]=2)[C:5]1=O.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>[F:15][C:8]1[CH:7]=[C:6]2[C:11]([C:12]([CH3:14])([CH3:13])[C:4]3[CH:3]=[CH:2][N:18]([CH2:19][C@H:20]([OH:22])[CH3:21])[C:5]=32)=[CH:10][CH:9]=1A solution of 3.04 g of (RS)-2-(2-oxoethyl)-6-fluoro-3,3-dimethyl-1-indanone and 110 mg of p-toluenesulfonic acid in 100 ml of anhydrous toluene was heated on a water separator. A solution of 4.14 g of (R)-1-amino-2-propanol in 40 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 (ethyl acetate/toluene 1:1). 2.0 g (56%) of (R)-1-(7-fluoro-4,4-dimethyl-1,4-dihydro-indeno[1,2-b]pyrrol-1-yl)-propan-2-ol were obtained as a brown oil.
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