1: 5-Fluoro-1,3-dihydro-2H-indol-2-one With sodium hexamethyldisilazane in tetrahydrofuran T=-78°C; 1.75 h; 2: N-(2,2'-bischloro)diethyl-N-(1,1-dimethylethoxy)carbonyl amine in tetrahydrofuran T=-78°C; 19 h;