1: trans-4,5-diphenyl-1,3-oxazolidin-2-one With (R)-7-chloro-2-phenyl-2,3-dihydroimidazo[1,2-a]quinoline; N-ethyl-N,N-diisopropylamine in 1,1-dimethylpropan-1-ol T=0°C; Resolution of racemate; 2: isobutyric anhydride in 1,1-dimethylpropan-1-ol T=0°C; 15 h; Resolution of racemate; Reagent/catalystTime; enantioselective reaction;