1: (S)-(-)-4-phenyl-2-oxazolidinone With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.333333 h; Inert atmosphere; 2: 4-methyl-2-pentenoic acid chloride in tetrahydrofuran; hexane T=-78 - 0°C; 2 h; Inert atmosphere; 3: With ammonium chloride in tetrahydrofuran; hexane; water

1: triethylamine / tetrahydrofuran 2: 1.) n-butyllithium / 1.) THF, hexane, 10 min, 2.) THF, hexane View Scheme

in tetrahydrofuran T=-78 - 20°C; 3 h; Yield given;

lithium -78 deg C, 1 h then r.t., 3 h; Yield given;