1: 1,3-dihydro-indol-2-one With sodium hexamethyldisilazane in tetrahydrofuran T=-78°C; 0.5 h; 2: 1,5-Dichloro-3-ethyl-3-azapentane, Hydrochloride in tetrahydrofuran T=-78 - 20°C; 18 h;