in dichloromethane T=-78 - 20°C;

1: benzyl alcohol With lithium hexamethyldisilazane in tetrahydrofuran T=-78°C; Metallation; 2: t-butyl 3-(trichloromethyl)-1,2-oxaziridine-2-carboxylate in tetrahydrofuran T=-78 - 20°C; Substitution; Further stages.;