1: 4-bromo-7-azaindole With n-butyllithium in tetrahydrofuran T=-78°C; 0.916667 h; 2: N,O-dimethylacetohydroxamic acid in tetrahydrofuran T=-78 - 20°C; 3 h; 3: With ammonium chloride in tetrahydrofuran T=-78°C;