1: (4S,5R)-4-methyl-5-phenyl-1,3-oxazolidine-2-thione With sodium hydride in tetrahydrofuran T=0°C; 0.75 h; 2: (2E)-3-phenylprop-2-enoyl chloride in tetrahydrofuran T=0°C; 1 h;

(+/-)-2-Ethyloxirane; trifluoroacetic acid in dichloromethane T=0°C;