1: 2,4-dibromoquinoline With n-butyllithium; diisopropylamine in tetrahydrofuran; hexane T=-78°C; 1 h; 2: N,N-dimethyl-formamide in tetrahydrofuran; hexane T=-78°C; 0.5 h;

sodium tetrahydroborate in methanol T=23°C;